Prosecution Insights
Last updated: October 02, 2026
Application No. 18/383,445

MULTIPORT FILTER HOUSING AND FILTER THEREOF

Final Rejection §102§103
Filed
Oct 24, 2023
Priority
Oct 24, 2022 — provisional 63/418,911
Examiner
ALI, WAQAAS A
Art Unit
1777
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Entegris Inc.
OA Round
2 (Final)
81%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 81% — above average
81%
Career Allowance Rate
450 granted / 555 resolved
+16.1% vs TC avg
Strong +18% interview lift
Without
With
+17.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
26 currently pending
Career history
574
Total Applications
across all art units

Statute-Specific Performance

§101
0.9%
-39.1% vs TC avg
§103
45.8%
+5.8% vs TC avg
§102
28.9%
-11.1% vs TC avg
§112
15.9%
-24.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 555 resolved cases

Office Action

§102 §103
DETAILED ACTION Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . StatusClaims(s) 1-19, is/are filed on 07/02/2026 are currently pending. Claim(s) 11-16 is/are withdrawn, 1-10, 17-19 is/are rejected. Claim Rejections - 35 USC § 102 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 the appropriate paragraphs of pre-AIA 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale or otherwise available to the public before the effective filing date of the claimed invention. (a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claim(s) 1-8, 10, 17-19 is/are rejected under 35 U.S.C. 102 (a)(1) as being anticipated by COLLIGNON (US 20120074053 A1). PNG media_image1.png 818 229 media_image1.png Greyscale PNG media_image2.png 834 416 media_image2.png Greyscale Regarding claim 1, COLLIGNON discloses a filter housing (56 + 41s combined), comprising: a sleeve (11) including a first open end, a second open end, and an interior volume, the interior volume having an outer radial portion and an inner radial portion [0072]; a filter member (14) disposed in the interior volume of the sleeve, the filter member separating the inner radial portion from the outer radial portion of the interior volume — the fiber membrane bundle (ends 14) separates lumen side (inner) from feed side (outer i.e. outer portion of 15) [0071]; a first endcap (41 - top) coupled to the first open end of the sleeve, the first endcap including a first plurality of ports (42, 43) that connect to the outer radial portion and the inner radial portion of the interior volume of the sleeve -- large feedstock inlet passageway 42" (outer) and a "smaller filtrate discharge passageway 43" (inner) [0077]; and a second endcap (41 - bottom) coupled to the second open end of the sleeve, the second endcap including a second plurality of ports (42, 43) that connect to the outer radial portion and the inner radial portion of the interior volume of the sleeve [0077], wherein at least one of the first endcap and the second endcap is removably coupled to the sleeve, the filter member is enclosed in the sleeve between the first endcap and the second endcap [0084] (figs. 1-4). Regarding claim 2, COLLIGNON teaches wherein the first plurality of ports includes an outer port (42) that extends to the outer radial portion of the interior volume of the sleeve and an inner port (43) that extends to the inner radial portion of the interior volume of the sleeve, and the second plurality of ports includes an outer port that extends to the outer radial portion of the interior volume of the sleeve and an inner port that extends to the inner radial portion of the interior volume of the sleeve -- outer port = feedstock inlet passageway (42); inner port = filtrate discharge passageway (43). Regarding claim 3, COLLIGNON teaches wherein the first endcap including one or more auxiliary ports (60) that respectively extend through the first endcap to one of the inner port and the outer port in the first endcap [0086]. Regarding claim 4, COLLIGNON teaches further comprising: a first fluid pathway extending from a first port in the first plurality of ports to a first port in the second plurality of ports, the first fluid pathway configured to extend through the filter member, and a second fluid pathway extending from the first port in the first plurality of ports to a second port in the first plurality of ports, the second fluid pathway configured to extend through the filter member -- First pathway (endcap A → endcap B, through filter): feed in at top feed passageway (42) → permeate crosses the membrane → filtrate out at bottom filtrate passageway (43). Second pathway (endcap A → another endcap A port, through filter): feed in at top feed passageway (42) → permeate crosses membrane → filtrate withdrawn at the same top header's filtrate passageway (43); '224 withdraws filtrate "at each end." (intended use). Regarding claim 5, COLLIGNON teaches further comprising: a third fluid pathway that extends from the first port in the first plurality of ports to a second port in the second plurality of ports, the third fluid pathway configured to not pass through the filter member -- Feed enters the top header feed passageway (42), flows tangentially along the fiber exteriors (crossflow), and the concentrated feed exits the bottom header feed passageway (42) without crossing the membrane — routed to '224's "concentrated feed outlet manifold 100” (intended use). Regarding claim 6, COLLIGNON teaches wherein the first endcap includes an end that faces the first open end of the sleeve, each port in the first plurality of ports having a respective opening in the end of the first endcap, and the second endcap includes an end that faces the second open end of the sleeve, each port in the second plurality of ports having a respective opening in the end of the second endcap -- Each header's downward flanges (46, 47) define a feed discharge port and a filtrate receiving port opening at the header face confronting the casing's open end. Regarding claim 7, COLLIGNON teaches wherein the sleeve has a tubular shape (fig. 1). Regarding claim 8, COLLIGNON teaches wherein a longitudinal axis of the sleeve and a longitudinal axis of the filter member are coaxial (fig. 1). Regarding claim 10, COLLIGNON teaches wherein the outer radial portion (i.e. the region outside of 15) has a tubular shape that encircles the inner radial portion (lumen side), and the filter housing is configured to dispose the filter member in the interior volume of the sleeve between the outer radial portion and the inner radial portion of the interior volume (intended use, fig. 2). Regarding claim 17, COLLIGNON teaches a filter (10), comprising: a filter member (14); and a filter housing (10), comprising: a sleeve (11) including a first open end, a second open end, and an interior volume, the interior volume having an outer radial portion and an inner radial portion [0072]; a filter member (14) disposed in the interior volume of the sleeve, the filter member separating the inner radial portion from the outer radial portion of the interior volume — the fiber membrane bundle (ends 14) separates lumen side (inner) from feed side (outer i.e. outer portion of 15) [0071]; a first endcap (41 - top) coupled to the first open end of the sleeve, the first endcap including a first plurality of ports (42, 43) that connect to the outer radial portion and the inner radial portion of the interior volume of the sleeve -- large feedstock inlet passageway 42" (outer) and a "smaller filtrate discharge passageway 43" (inner) [0077]; and a second endcap (41 - bottom) coupled to the second open end of the sleeve, the second endcap including a second plurality of ports (42, 43) that connect to the outer radial portion and the inner radial portion of the interior volume of the sleeve [0077], wherein at least one of the first endcap and the second endcap is removably coupled to the sleeve, the filter member is enclosed in the sleeve between the first endcap and the second endcap [0084] (figs. 1-4). Regarding claim 18, COLLIGNON teaches wherein the filter member is configured to filter liquid and to be replaceable from the housing [0084] (intended use). Regarding claim 19, COLLIGNON teaches wherein the sleeve (11) has a tubular shape, and a longitudinal axis of the sleeve and a longitudinal axis of the filter member are coaxial (fig. 1). 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 pre-AIA 35 U.S.C. 103(a) which forms the basis for all obviousness rejections set forth in this Office action: (a) A patent may not be obtained though the invention is not identically disclosed or described as set forth in section 102 of this title, if the differences between the subject matter sought to be patented and the prior art are such that the subject matter as a whole would have been obvious at the time the invention was made to a person having ordinary skill in the art to which said subject matter pertains. Patentability shall not be negatived by the manner in which the invention was made. The factual inquiries set forth in Graham v. John Deere Co., 383 U.S. 1, 148 USPQ 459 (1966), that are applied for establishing a background for determining obviousness under pre-AIA 35 U.S.C. 103(a) 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. Claim(s) 9 is/are rejected under 35 U.S.C. 103 as being unpatentable over COLLIGNON (US 20120074053 A1). Regarding claim 9, COLLIGNON does not teach wherein sleeve has an axial length that extends from the first end of the sleeve to the second end of the sleeve, and the axial length of the sleeve being less than 40 inches. Since the instant specification is silent to unexpected results, it would have been obvious to one of ordinary skill in the art before the effective filing date to have selected the axial length of the sleeve to be less than 40 inches, since such a modification would have involved a mere change in the size (or dimension) of a component and these are known standard sizing that enable to be fit in small and tight spaces (see at least US 5401399 A, C5/30-40). A change in size (dimension) is generally recognized as being within the level of ordinary skill in the art. In re Rose, 220 F.2d 459, 105 USPQ 237 (CCPA 1955). Where the only difference between the prior art and the claims is a recitation of relative dimensions of the claimed device, and the device having the claimed dimensions would not perform differently than the prior art device, the claimed device is not patentably distinct from the prior art device, Gardner v. TEC Systems, Inc., 725 F.2d 1338, 220 USPQ 777 (Fed. Cir. 1984), cert. denied, 469 U.S. 830, 225 USPQ 232 (1984). *** It is noted that any citations to specific, pages, columns, lines, or figures in the prior art references and any interpretation of the reference should not be considered to be limiting in any way. A reference is relevant for all it contains and may be relied upon for all that it would have reasonably suggested to one having ordinary skill in the art. See MPEP 2123. Response to Arguments Applicant' s arguments with respect to the claims have been considered but are moot because the arguments do not apply to any of the references being used in the current rejection. Conclusion THIS ACTION IS MADE FINAL. 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 extension fee 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 Waqaas Ali whose telephone number is (571) 270-0235. The examiner can normally be reached on M-F 9-5 PM. 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, Vickie Kim can be reached on 571-271-0579. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /WAQAAS ALI/Primary Examiner, Art Unit 1777
Read full office action

Prosecution Timeline

Oct 24, 2023
Application Filed
Apr 02, 2026
Non-Final Rejection mailed — §102, §103
Jul 02, 2026
Response Filed
Sep 10, 2026
Final Rejection mailed — §102, §103 (current)

Precedent Cases

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
81%
Grant Probability
99%
With Interview (+17.8%)
2y 7m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 555 resolved cases by this examiner. Grant probability derived from career allowance rate.

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