Prosecution Insights
Last updated: August 11, 2026
Application No. 17/101,707

FILTER MEDIA COMPRISING NON-FLUORINATED WATER REPELLENT ADDITIVES

Final Rejection §103§DOUBLEPATENT
Filed
Nov 23, 2020
Examiner
MCCULLOUGH, ERIC J.
Art Unit
1773
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Hollingsworth & Vose Company
OA Round
7 (Final)
32%
Grant Probability
At Risk
8-9
OA Rounds
0m
Est. Remaining
76%
With Interview

Examiner Intelligence

Grants only 32% of cases
32%
Career Allowance Rate
130 granted / 405 resolved
-32.9% vs TC avg
Strong +44% interview lift
Without
With
+44.1%
Interview Lift
resolved cases with interview
Typical timeline
3y 10m
Avg Prosecution
33 currently pending
Career history
445
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
57.6%
+17.6% vs TC avg
§102
10.6%
-29.4% vs TC avg
§112
24.8%
-15.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 405 resolved cases

Office Action

§103 §DOUBLEPATENT
DETAILED ACTION This action is in response to the amendments and remarks filed 03/09/2026, in which claims 1 and 16 have been amended, and claims 1, 16, 30-31, 37-38, 41-42, 44, 46, 50-52, 58, 60, 62, 74-75 and 77-78 are pending and ready for examination. Information Disclosure Statement The information disclosure statement(s) (IDS) submitted on 09 MARCH 2026 is/are in compliance with the provisions of 37 CFR 1.97 and has/have been considered. An initialed copy of Form 1449 is enclosed herewith. The Non Patent Literature Document “JIANG et al., Industrial Dedusting Apparatus – Design, Production, and Management. Metallurgical Industry Press. 2007, page 265”, was provided by Applicants but no translation or explanation of the relevance was provided, thus it was reviewed and the information was considered insofar as it was understood on its face, in the same manner that non-English language information in Office search files is considered by examiners in conducting searches; see MPEP 609. Claim Rejections - 35 USC § 103 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. The factual inquiries for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. Claims 1, 16, 30-31, 37-38, 50-52, 58, 60, 62, 74-75 and 77-78 are rejected under 35 U.S.C. 103 as being unpatentable over US 2012/0107588 A1 (hereinafter “Sealy”) in view of US 2016/0030868 A1 (hereinafter “Gupta”) further in view of US 2016/0017375 A1 (hereinafter “Rachi”) or, alternatively, CN 110052058 A (hereinafter “Li”). Regarding Claim 1 Sealy discloses a filter media, comprising: a non-woven fiber web [0015], [0106]; and “one or more water repellents” which “can have any suitable form and may include a fluorinated or a non-fluorinated species”, wherein “[n]on-limiting examples of suitable water repelling agents include silanes, siloxanes, silicones, alkylketene dimers (AKDS), and fluorinated species” [0041], [0044]; the filter media has a gamma which may be may be “between about 1 to about 30”, including between about “8 and about 20” [0092], with an average of 12.2 gamma in the examples [0126], which overlaps the range claimed; and the filter media has a water repellency of “between about 1 kPa and about 20 kPa” [0007] (i.e. ~4~80 in H2O), which overlaps the range claimed. Since the range disclosed overlaps the range claimed, the range recited in the claim is considered prima facie obvious. Overlapping ranges are prima facie evidence of obviousness. It would have been obvious to one having ordinary skill in the art to have selected the portion of Sealy’s ranges that corresponds to the claimed ranges. See MPEP 2144.05(I). Sealy does not disclose a water repellent which is a polymer or oligomer having the structure as claimed. However Gupta discloses a nonwoven filter material [0002], [0014], which comprises a hydrophobic agent (i.e. a water repellent additive) applied to the fibers, which may be silane siloxane, or silazane compounds including hexamethyldisilazane, and which react with itself and/or a fiber surface including forming oligomeric or polymeric structure on the fibers [0037]-[0038], [0040]. And thus disclose that silazanes are a known alternative hydrophobic agents/water repellents to silanes and siloxanes. Therefore, before the effective filing date, it would have been prima facie obvious to one of ordinary skill in the art to modify the filter media of Sealy by using for the water repellent a silazane, including hexamethyldisilazane, and reacting it with itself and/or a fiber surface including forming oligomeric or polymeric structure on the fibers as disclosed by Gupta because Sealy discloses the filter media may comprise silane or siloxane water repellent additives and this involves the simple substitution of a known alternative to silane/siloxane water repellents for nonwoven filter media to obtain the predictable result of forming a water repellent filter media. Gupta suggests water repellents with alkyl side chains having between 1 and 18, 1 and 8, and 2 and 50 carbon atoms [0037]-[0038], [0040], but not specifically for silazane compounds. However Rachi discloses a hydrophobic agent for treating an adsorbent, which is a disilazane, including 4, 5 or 6 hydrophobic alkyl groups, including hexaalkyldisilazane, wherein the alkyl groups have from 1-20 carbon atoms, specifically including hexamethyldisilazane, [0052]-[0055]. Thus disclosing hexaalkyldisilazanes with alkyl chains having 1-20 carbons are a known alternative hydrophobic agents/water repellents to hexamethyldisilazane. Therefore, before the effective filing date, it would have been prima facie obvious to one of ordinary skill in the art to modify the filter media of Sealy in view of Gupta by using for the water repellent a hexaalkyldisilazane, wherein the alkyl groups have from 1-20 carbon atoms, as disclosed by Rachi because this involves the simple substitution of a hexaalkyldisilazane hydrophobic agent/water repellent (i.e. hexamethyldisilazane), with another having longer alkyl groups to obtain the predictable result of forming a water repellent filter media. Sealy in view of Gupta and Rachi thus discloses a water repellent additive having repeat units of polymerized silazane forming an oligomer or polymer and water repellent functional groups which are each independently an alkyl group comprising 1-20 carbon atoms and a side chain of a repeat unit. Since the range of carbon chain length disclosed overlaps the range claimed, the range recited in the claim is considered prima facie obvious. Overlapping ranges are prima facie evidence of obviousness. It would have been obvious to one having ordinary skill in the art to have selected the portion of the disclosed range that corresponds to the claimed range. See MPEP 2144.05(I). With regard specifically to “fluorine atoms make up less than or equal to 10 at% of the water-repellent additive”, it is not disclosed that the siloxane water repellents must include fluorine and thus fluorine atoms may make up zero percent of the water-repellent additive. Alternatively, Li discloses using an organopolysilazane surface modification of copper based water treatment media to render it hydrophobic, wherein the organopolysilazane includes a main chain of Si-N bonds and side groups, wherein the side groups may be straight or branched alky groups containing 1-5 carbon atoms, and that “[o]rganopolysilazane has good solubility, broad adaptability and anchoring effect to the substrate, mild curing conditions, simple curing process, and the constructed coating has excellent thermal stability, chemical resistance, weather resistance, scratch resistance and transparency make it an attractive prospect in the construction of high-performance coatings; (pg. 2, para starting “Organopolysilazane is an…” and para. starting “Described organopolysilazane is…”, pg. 3 para starting “(3) The durable modified…”,). Therefore, before the effective filing date, it would have been prima facie obvious to one of ordinary skill in the art to modify the filter media of Sealy in view of Gupta by using for the water repellent an organopolysilazane with side groups which are straight or branched alky groups containing 1-5 carbon atoms, as disclosed by Li because this involves the simple substitution of a silazane hydrophobic agent/water repellent with another known silazane hydrophobic agent/water repellent to obtain the predictable result of forming a water repellent filter media. Sealy in view of Gupta and Li thus discloses a water repellent additive having repeat units of polymerized silazane forming an oligomer or polymer and water repellent functional groups which are each independently an alkyl group comprising 1-5 carbon atoms and a side chain of a repeat unit. Since the range of carbon chain length disclosed overlaps the range claimed, the range recited in the claim is considered prima facie obvious. Overlapping ranges are prima facie evidence of obviousness. It would have been obvious to one having ordinary skill in the art to have selected the portion of the disclosed range that corresponds to the claimed range. See MPEP 2144.05(I). With regard specifically to “fluorine atoms make up less than or equal to 10 at% of the water-repellent additive”, it is not disclosed that the siloxane water repellents must include fluorine Claim 1 is thus rejected under Sealy in view of Gupta and Rachi, and alternatively Sealy in view of Gupta and Li. Regarding Claim 16 Sealy in view of Gupta and Rachi/Li discloses the filter media as in claim 1, wherein the water-repellent additive comprises a silazane, and as disclosed by Li, silazanes are known to be hydrolyzed so that the a large number of the Si-N and Si-H bonds inherent to silazane form silanols and -Si-O- to solidify and increase hydrophobicity (pg. 2, para starting “Organopolysilazane is an…” and pg. 3 para starting “(3) The durable modified…”,); and thus the silazane coatings will inherently comprise silanol groups, and/or it would have been prima facie obvious to one of ordinary skill in the art to modify the filter media of Sealy in view of Gupta and Rachi/Li by hydrolyzing the silazanes to form silanols and -Si-O- to solidify and increase hydrophobicity of the hydrophobic coating. Thus the water repellent additive comprises a silanol. Regarding Claim 30 Sealy in view of Gupta and Rachi/Li discloses the filter media as in claim 1, wherein the filter media comprises a resin (binder resin Sealy [0029], or the fluorinated species itself Sealy [0033]. Regarding Claim 31 Sealy in view of Gupta and Rachi/Li discloses the filter media as in claim 30, wherein the resin may comprise a copolymer comprising a fluorinated repeat unit and a non-fluorinated/hydrocarbon repeat unit Sealy [0033]. Regarding Claim 37 Sealy in view of Gupta and Rachi/Li discloses the filter media as in claim 30, wherein the resin comprises poly(vinylidene difluoride) (the fluoridated repeat unit may be vinylidene fluoride Sealy [0035]). Regarding Claim 38 Sealy in view of Gupta and Rachi/Li discloses the filter media as in claim 30, wherein the fluoridated repeat unit of the copolymer resin may be vinylidene fluoride Sealy [0035]) and the non-fluorinated/hydrocarbon repeat unit may be acrylate Sealy [0033], and thus may obviously the copolymer may be a poly(vinylidene difluoride)-acrylic copolymer. Regarding Claim 50-51 and 58 Sealy in view of Gupta and Rachi/Li discloses the filter media as in claim 1, wherein the non-woven fiber web comprises glass fibers, including chopped strand and/or microglass fibers Sealy [0060]-[0079], [0106]. Regarding Claim 52 Sealy in view of Gupta and Rachi/Li discloses the filter media as in claim 51, wherein the non-woven web comprises two or more types of microglass fibers having different average diameters (Sealy: chopped strand and microglass can be mixed [0106], and “any suitable distribution” of fiber diameter is acceptable [0062], including used coarse and/or fine [0074], and thus obviously the mixture of different average diameters is suggested to one of skill in the art). Regarding Claim 60 Sealy in view of Gupta and Rachi/Li discloses the filter media as in claim 1, wherein the non-woven fiber web comprises synthetic fibers Sealy [0080], [0106]. Regarding Claim 62 Sealy in view of Gupta and Rachi/Li discloses the filter media as in claim 1, wherein the non-woven fiber web comprises cellulose fibers Sealy [0081]. Regarding Claim 74 Sealy in view of Gupta and Rachi/Li discloses the filter media as in claim 1, wherein the water-repellent additive may comprise one or more branches, i.e. at least because the side groups may be considered branches. Regarding Claim 75 Sealy in view of Gupta and Rachi/Li discloses the filter media as in claim 1, wherein “[w]hen a fluorinated species is added to a binder resin, it may be between about 0.01% and about 40% … of the dry weight of the binder resin.” Sealy [0040] and no other perfluoroalkyl substances are required in the media, and additional additives in small percentages are optional Sealy [0054]; thus perfluoroalkyl substances make up less than or equal to 10 wt% of the additives present in the non-woven fiber web, where the binder is considered an additive. Since the range disclosed overlaps the range claimed, the range recited in the claim is considered prima facie obvious. Overlapping ranges are prima facie evidence of obviousness. It would have been obvious to one having ordinary skill in the art to have selected the portion of Sealy’s ranges that corresponds to the claimed ranges. See MPEP 2144.05(I). Regarding Claim 77 Sealy in view of Gupta and Rachi/Li discloses the filter media as in claim 1, wherein the water-repellent additive may be an oligomer; Rachi [0052]-[0055], Li para. starting “Organopolysilazane is an…” the degree of polymerization is not disclosed and thus may obviously be an oligomer. Regarding Claim 78 Sealy in view of Gupta and Rachi/Li discloses the filter media as in claim 1, wherein the water-repellent additive may be a polymer, Rachi [0052]-[0055]; Li para. starting “Organopolysilazane is an…”. Claims 41-42, 44 and 46 are rejected under 35 U.S.C. 103 as being unpatentable over US 2012/0107588 A1 (hereinafter “Sealy”) in view of Gupta and Rachi/Li further in view of Hikmet Ziya Özek, 7 - Silicone-based water repellents, Editor(s): John Williams, In The Textile Institute Book Series, Waterproof and Water Repellent Textiles and Clothing, Woodhead Publishing, 2018, Pages 153-189 (hereinafter “Ozek”). Regarding Claim 41-42 and 44 Sealy in view of Gupta and Rachi/Li discloses the filter media as in claim 1, but does not disclose wherein the water-repellent additive comprises one or more polar, non-hydrolysable groups. However Ozek discloses silicone based water repellents for fabrics and textiles, which may be siloxanes polymers/oligomers, similar to that disclosed by Gupta to be known alternatives to silazanes, supra, having a plurality of polymerized Si repeat units, the repeat units being arranged such that the polymer/oligomer may be a copolymer with different repeat units, some of said repeat units having one or more water-repellent functional groups, where said water-repellent functional groups may including side chains having an alkyl group or an amino groups, where the amino groups are added to impart additional properties including catalytic activity; see Sec. 7.2 Characteristics of silicone water repellents, Fig. 7.2, 7.6 and Table 7.1 Therefore, before the effective filing date, it would have been prima facie obvious to one of ordinary skill in the art to modify the filter media of Sealy in view of Gupta and Rachi/Li by using for some of the side chain water repellent functional groups of the water repellent additive amino groups as disclosed by Ozek because it is disclosed that side chain amino groups are known to include in similar water repellent siloxane polymers to add additional properties. Thus the water-repellent additive of Sealy in view of Gupta, Ozek and Rachi/Li comprises amino functional groups, i.e. which are polar, non-hydrolysable groups, and which are each independently bonded to a silicon atom and are each independently a side chain of a repeat unit in the plurality of repeat units. Regarding Claim 46 Sealy in view of Gupta, Ozek and Rachi/Li discloses the filter media as in claim 41, wherein with regard to “a ratio of the number of water-repellent functional groups to the number of one or more polar, non-hydrolysable groups” this is not specifically disclosed however it is noted that the functional groups are chosen to provide desired surface properties (Ozek Table 7.1, Sec. 7.2), and the relative amounts of each functional group are thus variables which achieve a recognized result, and it would therefore have been obvious for one of skill in the art to optimize this variable through routine experimentation, by using values including those within the scope of the present claims, so as to produce desired end results. See MPEP § 2144.05 (B). Further, when faced with a mixture, one of ordinary skill in the art would be motivated by common sense to select a 1:1 ratio, a ratio that falls within the presently claimed amount, absent evidence of unexpected or surprising results. Case law holds that "[h]aving established that this knowledge was in the art, the examiner could then properly rely... on a conclusion of obviousness, 'from common knowledge and common sense of the person of ordinary skill in the art without any specific hint or suggestion in a particular reference.'" In re Bozek, 416 F.2d 1385, 1390, 163 USPQ 545, 549 (CCPA 1969). Double Patenting The nonstatutory double patenting rejection is based on a judicially created doctrine grounded in public policy (a policy reflected in the statute) so as to prevent the unjustified or improper timewise extension of the “right to exclude” granted by a patent and to prevent possible harassment by multiple assignees. A nonstatutory double patenting rejection is appropriate where the conflicting claims are not identical, but at least one examined application claim is not patentably distinct from the reference claim(s) because the examined application claim is either anticipated by, or would have been obvious over, the reference claim(s). See, e.g., In re Berg, 140 F.3d 1428, 46 USPQ2d 1226 (Fed. Cir. 1998); In re Goodman, 11 F.3d 1046, 29 USPQ2d 2010 (Fed. Cir. 1993); In re Longi, 759 F.2d 887, 225 USPQ 645 (Fed. Cir. 1985); In re Van Ornum, 686 F.2d 937, 214 USPQ 761 (CCPA 1982); In re Vogel, 422 F.2d 438, 164 USPQ 619 (CCPA 1970); In re Thorington, 418 F.2d 528, 163 USPQ 644 (CCPA 1969). A timely filed terminal disclaimer in compliance with 37 CFR 1.321(c) or 1.321(d) may be used to overcome an actual or provisional rejection based on nonstatutory double patenting provided the reference application or patent either is shown to be commonly owned with the examined application, or claims an invention made as a result of activities undertaken within the scope of a joint research agreement. See MPEP § 717.02 for applications subject to examination under the first inventor to file provisions of the AIA as explained in MPEP § 2159. See MPEP § 2146 et seq. for applications not subject to examination under the first inventor to file provisions of the AIA . A terminal disclaimer must be signed in compliance with 37 CFR 1.321(b). The USPTO Internet website contains terminal disclaimer forms which may be used. Please visit www.uspto.gov/patent/patents-forms. The filing date of the application in which the form is filed determines what form (e.g., PTO/SB/25, PTO/SB/26, PTO/AIA /25, or PTO/AIA /26) should be used. A web-based eTerminal Disclaimer may be filled out completely online using web-screens. An eTerminal Disclaimer that meets all requirements is auto-processed and approved immediately upon submission. For more information about eTerminal Disclaimers, refer to www.uspto.gov/patents/process/file/efs/guidance/eTD-info-I.jsp. Claims 1, 16, 30-31, 37-38, 50-52, 58, 60, 62, 74-75 and 77-78 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-2, 6-10, 12-13, 21, 23, 25, 38, 72-74, 84 and 108 of copending Application No. 17/534186 in view of Sealy. Although the claims at issue are not identical, they are not patentably distinct from each other because the claims of 17/534186 disclose all the limaitons of claims 1, 16, 30, 50-52, 58, 60, 62, 74 and 77-78, except for the following limaitons of claim 1: fluorine atoms make up less than or equal to 10 at% of the water-repellent additive; the filter media has a gamma of greater than 6; and the filter media has a water repellency of greater than 4 inches H20. However, with regard to gamma and water repellency, Sealy, as cited above, discloses a similar filter media having a gamma which may be may be “between about 1 to about 30”, including between about “8 and about 20” [0092], with an average of 12.2 gamma in the examples [0126], which overlaps the range claimed; and the filter media has a water repellency of “between about 1 kPa and about 20 kPa” [0007] (i.e. ~4~80 in H2O), which overlaps the range claimed. Therefore, before the effective filing date, it would have been prima facie obvious to one of ordinary skill in the art to modify the filter media of 17/534186 by using gamma and water repellency values as disclosed by Sealy because this involves the simple substitution of known gamma and water repellency values of known nonwoven filter media containing water repellents. Since the range disclosed overlaps the range claimed, the range recited in the claim is considered prima facie obvious. Overlapping ranges are prima facie evidence of obviousness. It would have been obvious to one having ordinary skill in the art to have selected the portion of Sealy’s ranges that corresponds to the claimed ranges. See MPEP 2144.05(I). With regard to fluorine atoms in the water repellent, Gupta discloses a similar water repellent as cited above, which does not contain fluorine atoms, and therefore before the effective filing date, it would have been prima facie obvious to one of ordinary skill in the art to modify the filter media of 17/534186 by using no fluorine atoms in the water repellent as is disclosed Gupta because this it is known that they are not needed for similar water repellent molecules. Thus Application No. 17/534186 in view of Sealy discloses the limaitons of claims 1, 16, 30, 50-52, 58, 60, 62, 74 and 77-78. With regard to dependent claims 31, 37-38 and 75, 17/534186 in view of Sealy discloses claims 1 and 30, but not the limaitons of claims 31, 37-38 and 75. However, Sealy discloses a resin in the filter media wherein the resin may comprise a copolymer comprising a fluorinated repeat unit and a non-fluorinated/hydrocarbon repeat unit [0033], wherein the resin comprises poly(vinylidene difluoride) (the fluoridated repeat unit may be vinylidene fluoride [0035]), wherein the fluoridated repeat unit of the copolymer resin may be vinylidene fluoride [0035]) and the non-fluorinated/hydrocarbon repeat unit may be acrylate [0033], and thus may obviously the copolymer may be a poly(vinylidene difluoride)-acrylic copolymer. And wherein “[w]hen a fluorinated species is added to a binder resin, it may be between about 0.01% and about 40% … of the dry weight of the binder resin.” [0040] and no other perfluoroalkyl substances are required in the media, and additional additives in small percentages are optional [0054]; thus perfluoroalkyl substances make up less than or equal to 10 wt% of the additives present in the non-woven fiber web, where the binder is considered an additive. Therefore, before the effective filing date, it would have been prima facie obvious to one of ordinary skill in the art to modify the filter media of 17/534186 by using the resin and no other perfluoroalkyl substances as disclosed by Sealy because this involves the simple substitution of known fluorinated resins included in known nonwoven filter media containing water repellents. Since the range disclosed overlaps the range claimed, the range recited in the claim is considered prima facie obvious. Overlapping ranges are prima facie evidence of obviousness. It would have been obvious to one having ordinary skill in the art to have selected the portion of Sealy’s ranges that corresponds to the claimed ranges. See MPEP 2144.05(I). Thus Application No. 17/534186 in view of Sealy discloses the limaitons of claims 31, 37-38 and 75. Claims 41-42, 44, and 46 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-2, 6-10, 12-13, 21, 23, 25, 38, 72-74, 84 and 108 of copending Application No. 17/534186 in view of Sealy further in view of Ozek. With regard to claims 41-42, 44 and 46, 17/534186 in view of Sealy discloses claims 1, but not the limitations of claims 41-42, 44 and 46. However Ozek discloses wherein a water-repellent additive may additionally comprise amino functional groups, i.e. which are polar, non-hydrolysable groups, and which are each independently bonded to a silicon atom and are each independently a side chain of a repeat unit in the plurality of repeat units; (Ozek Table 7.1). Therefore, before the effective filing date, it would have been prima facie obvious to one of ordinary skill in the art to modify the filter media of 17/534186 by using amino functional groups in the water repellent as disclosed by Ozek because this involves the simple substitution of known water repellent functional groups included in known nonwoven filter media containing water repellents. With regard to claim 46, “a ratio of the number of water-repellent functional groups to the number of one or more polar, non-hydrolysable groups” this is not specifically disclosed however it is noted that the functional groups are chosen to provide desired surface properties (Ozek Table 7.1, Sec. 7.2), and the relative amounts of each functional group are thus variables which achieve a recognized result, and it would therefore have been obvious for one of skill in the art to optimize this variable through routine experimentation, by using values including those within the scope of the present claims, so as to produce desired end results. See MPEP § 2144.05 (B). Further, when faced with a mixture, one of ordinary skill in the art would be motivated by common sense to select a 1:1 ratio, a ratio that falls within the presently claimed amount, absent evidence of unexpected or surprising results. Case law holds that "[h]aving established that this knowledge was in the art, the examiner could then properly rely... on a conclusion of obviousness, 'from common knowledge and common sense of the person of ordinary skill in the art without any specific hint or suggestion in a particular reference.'" In re Bozek, 416 F.2d 1385, 1390, 163 USPQ 545, 549 (CCPA 1969). Thus Application No. 17/534186 in view of Sealy and Ozek discloses the limaitons of claims 41-42, 44 and 46. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Response to Arguments Applicant's arguments filed 03/09/2026 have been fully considered and they are persuasive with regard to the previous combination of references as they would apply to the amended claims, but they are now moot because they are directed in their entirety to grounds of rejection which are no longer cited in the current action and the new limitations of the amended claims which had not been previously addressed. See the updated rejection above citing a new combination of references to address the amended claims. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Eric J. McCullough whose telephone number is (571)272-8885. The examiner can normally be reached Monday-Friday 10:00-6:00. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Benjamin L Lebron can be reached at 571-272-0475. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /ERIC J MCCULLOUGH/ Examiner, Art Unit 1773 /BENJAMIN L LEBRON/ Supervisory Patent Examiner, Art Unit 1773
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Prosecution Timeline

Show 12 earlier events
Dec 05, 2024
Response after Non-Final Action
Mar 14, 2025
Non-Final Rejection mailed — §103, §DOUBLEPATENT
Jun 16, 2025
Response Filed
Sep 08, 2025
Non-Final Rejection mailed — §103, §DOUBLEPATENT
Mar 09, 2026
Response Filed
Apr 07, 2026
Final Rejection mailed — §103, §DOUBLEPATENT
Aug 07, 2026
Request for Continued Examination
Aug 10, 2026
Response after Non-Final Action

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3y 10m to grant Granted Jun 09, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

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Prosecution Projections

8-9
Expected OA Rounds
32%
Grant Probability
76%
With Interview (+44.1%)
3y 10m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 405 resolved cases by this examiner. Grant probability derived from career allowance rate.

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