Prosecution Insights
Last updated: April 19, 2026
Application No. 17/492,755

RADICAL CURABLE ANTI-FOG COATINGS

Non-Final OA §103
Filed
Oct 04, 2021
Examiner
NILAND, PATRICK DENNIS
Art Unit
1762
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Sdc Technologies Inc.
OA Round
5 (Non-Final)
63%
Grant Probability
Moderate
5-6
OA Rounds
3y 5m
To Grant
58%
With Interview

Examiner Intelligence

Grants 63% of resolved cases
63%
Career Allow Rate
801 granted / 1270 resolved
-1.9% vs TC avg
Minimal -5% lift
Without
With
+-5.3%
Interview Lift
resolved cases with interview
Typical timeline
3y 5m
Avg Prosecution
54 currently pending
Career history
1324
Total Applications
across all art units

Statute-Specific Performance

§101
0.8%
-39.2% vs TC avg
§103
54.9%
+14.9% vs TC avg
§102
10.8%
-29.2% vs TC avg
§112
16.2%
-23.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1270 resolved cases

Office Action

§103
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 . A request for continued examination under 37 CFR 1.114, including the fee set forth in 37 CFR 1.17(e), was filed in this application after final rejection. Since this application is eligible for continued examination under 37 CFR 1.114, and the fee set forth in 37 CFR 1.17(e) has been timely paid, the finality of the previous Office action has been withdrawn pursuant to 37 CFR 1.114. Applicant's submission filed on 1/6/26 has been entered. The amendment of 1/6/26 has been entered. Claims 1-3 and 5-20 are pending. Rejections Claim Rejections - 35 USC § 103 1. 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. 2. Claims 1-3, 6-9, 11-12, and 14-20 are rejected under 35 U.S.C. 103 as being unpatentable over JP 1995-041542 Yokoshima, the English translation provided by the examiner being referenced below unless otherwise noted, with US Pat. Application Publication No. 2009/0239765 Hasegawa et al. being cited as evidence that polyvinylpyrrolidone is a surfactant. Hasegawa, paragraph [0040], teaches that polyvinylpyrrolidone is a surfactant. Regarding claims 1-3, 6-8, 11, 12, and 14-20: Yokoshima, paragraph [0039] reacts 669 parts of the polyol of formula (2), which falls within the scope of the instantly claimed isocyanate-reactive surfactant, polytetramethylene glycol, which falls within the scope of the instantly claimed polyol, isophorone diisocyanate, which is polyisocyanate, and 2-hydroxylethyl acrylate which falls within the scope of the instant claimed component D. The molecular weight of the polyol of formula (2) of paragraph [0008] of Yokoshima is 836 g/mole. The amounts of Yokoshima, paragraph [0039] give 25 weight% of polyisocyanate, which falls within the scope of the amounts of polyisocyanate of the instant claims. The amounts of Yokoshima, paragraph [0039] give 4 moles of the polyol of formula (2) per 1 mole of polytetramethylene glycol. Yokoshima, paragraph [0031], discloses using a molar ratio of surfactant polyol to polyol of 50:50, i.e. 1:1. Reducing the amount of the polyol of formula (2) of Yokoshima’s example of paragraph [0039] gives 167.25 g polyol of formula (2)/ 822.55 grams of total reactants which gives 20.33 wt% of the polyol of formula (2) of Yokoshima which falls within the scope of the instantly claimed amounts of isocyanate-reactive surfactant because 20.33 rounds down to 20 within the decimal accuracy required by the instantly claimed “20”. Furthermore, note that the ratio of isocyanate groups of the polyisocyanate to isocyanate active groups of the two polyols of Yokoshima, paragraph [0039], is 3/2. Yokoshima, paragraph [0031], discloses ratios as low as 1.1 as being preferable. Therefore, one may significantly raise the amount of polyisocyanate while maintaining the percentage of polyisocyanate within the scope of the instant claims to give an even lower percentage of polyol of formula (2) of Yokoshima. Yokoshima therefore encompasses the instantly claimed radical curable polyurethane having ethylenically unsaturated functional groups. The compositions of Yokoshima contain reactive diluent and/or water which fall within the scope of the instantly claimed liquid phase. See Yokoshima, paragraph [0032] and paragraph [0043], Table 1, noting the water, liquid acrylates, and Darocure 2959 which is the instantly claimed initiator. See Yokoshima, paragraph [0033], noting the photoinitiators therein. Yokoshima thereby encompasses coating compositions which fall within the scope of the instant claim 1. The amount of hydroxyacrylate of Yokoshima, paragraph [0039] discloses 122/822 100% based on the above discussed reduced amount of polyol of formula (2) or 14.8 wt% which falls within the scope of the instant claim 2. The exemplified 2-hydroxylethyl acrylate of Yokoshima, paragraph [0039], falls within the scope of the instant claims 3 and 8 because the exemplified 2-hydroxylethyl acrylate of Yokoshima can be made by alkoxylating acrylic acid with ethylene oxide. The exemplified 2-hydroxylethyl acrylate of Yokoshima is therefore necessarily an isocyanate reactive alkoxylated acrylate of the instant claims 3 and 8. Yokoshima exemplifies the use of water and reactive diluent monomers in their coating compositions. The reactive diluent monomers are the organic solvent of the instant claim 7. The exemplified polyethylene glycol diacrylate of Yokoshima, page 17, line 16 falls within the scope of the instant claim 11. Note Yokoshima, page 13, line 21 and the entirety of paragraph [0032] also. These compounds of Yokoshima also fall within the scope of the instant claim 12 noting that the polyethylene oxide chain is hydrophilic and hydrophobic which makes it a surfactant and the (meth)acrylate units make it radically reactive. The similarity of the compositions of Yokoshima to the instantly claimed compositions is such that the compositions of Yokoshima would have been expected to necessarily have the properties of the instantly claimed compositions including the properties of the instant claims 14-16 and 19-20. See MPEP 2112. The compositions of Yokoshima are disclosed as radiation curable. They are therefore necessarily cured by the energy of electron beams as well. The compositions of Yokoshima discussed herein and the articles coated therewith therefore fall within the scope of the instant claims 17-18. Note Yokoshima, page 19, line 1, noting the electron beam particularly. Note the coated articles of Yokoshima, paragraph [0047]. It further appears that Yokoshima, paragraph [0041] exemplifies polyethylene glycol, which falls within the scope of the instant claim 6, in a polyurethane acrylate which can be modified within the broader teachings to give the instantly claimed coating compositions for similar reasons as are applied to Yokoshima, paragraph [0039] in the above discussion. It would have been obvious to one of ordinary skill in the art prior to the instantly claimed invention to make the coating compositions and coated articles of the instant claims 1-3, 6-8, 11, 12, and 14-20 from the disclosure of Yokoshima because they are encompassed by Yokoshima, as discussed above and would have been expected to give coating compositions having the properties of the coating compositions of Yokoshima, including the properties specified by Yokoshima, such as the ability to give films having excellent water resistance, and the properties inherent to the coating compositions of Yokoshima. No unexpected result is seen stemming from any difference between the instant claims and Yokoshima which is demonstrated in a manner commensurate in scope with the instant claims and which compares to the closest prior art, e.g. Yokoshima. See MPEP 716.02(d) Unexpected Results Commensurate in Scope With Claimed Invention [R-08.2012]. Regarding claim 6: Yokoshima discloses using polyethylene glycol or polypropylene glycol as their polyols at paragraph [0028], particularly page 12, line 7. It would have been obvious to one of ordinary skill in the art prior to the instantly claimed invention to make the coating compositions of the instant claims, as discussed above, using polyethylene glycol or polypropylene glycol in place of the exemplified polytetramethylene glycol of Yokoshima because it is disclosed for use in their polyurethane acrylates and would have been expected to give slightly more hydrophilic films than those of Yokoshima’s example discussed above coupled with the other properties of the film formed by the compositions of Yokoshima. It further appears that Yokoshima, paragraph [0041] exemplifies polyethylene glycol in a polyurethane acrylate which can be modified within the broader teachings to give the instantly claimed coating compositions for similar reasons as are applied to Yokoshima, paragraph [0039] in the above discussion. Regarding claim 9: Yokoshima, paragraph [0036] teaches using commonly known additives, including polyvinylpyrrolidone, in their compositions. Hasegawa, paragraph [0040] teaches that polyvinylpyrrolidone is a surfactant. The polyvinylpyrrolidone of Yokoshima, paragraph [0036] therefore falls within the scope of the non-reactive surfactant of the instant claim 9, as one of ordinary skill would understand “non-reactive” to mean in this sense. It would have been obvious to one of ordinary skill in the art prior to the instantly claimed invention to make the coating compositions of the instant claims, as discussed above, which contain the non-reactive surfactant of the instant claim 9 from the disclosure of Yokoshima because the instantly claimed compositions are encompassed by Yokoshima, as discussed above, Yokoshima discloses using polyvinylpyrrolidone in their compositions, which is a non-reactive surfactant as taught by Hasegawa, and the resulting composition would have been expected to give coating compositions having the properties of the coating compositions of Yokoshima which include the benefits of the polyvinylpyrrolidone taught by Yokoshima. No unexpected result is seen stemming from any difference between the instant claims and Yokoshima which is demonstrated in a manner commensurate in scope with the instant claims and which compares to the closest prior art, e.g. Yokoshima. See MPEP 716.02(d) Unexpected Results Commensurate in Scope With Claimed Invention [R-08.2012]. 3. Claims 1-3, 5-9, and 11-20 are rejected under 35 U.S.C. 103 as being unpatentable over JP 2004-143303 Kawamoto et al., the English translation provided by the examiner being referenced below unless otherwise noted, in view of US Pat. No. 4006024 Ibata et al. Regarding claims 1-3, 5-9, and 11-20: Kawamoto discloses active energy curing coating compositions which give excellent antistatic performance, antifoggingness and scratch resistance. See their abstract and paragraph [0001]. The compositions of Kawamoto contain a single radical curable polyurethane having ethylenically unsaturated functional groups, organic solvent which is the instantly claimed liquid phase, and initiator. See Kawamoto, paragraphs [0001], [0012], and [0059], noting the solvent which falls within the scope of the liquid phase of the instant claims including the instant claims 1, 7, and 17. The coatings of Kawamoto are curable by electron beam which falls within the scope of the instant claim 17. See Kawamoto, page 26, lines 13-15, noting electron beams. Kawamoto, paragraph [0007], discloses reacting a polyisocyanate-based compound, a hydroxyl group containing quaternary ammonium salt-based compound according to formula (1) of paragraph [0008] and a hydroxyl group-containing (meth)acrylate-based compound. It is noted that the polyisocyanate-based compound may be a reaction product of polyethylene glycol or polypropylene glycol with polyisocyanate to give a polyisocyanate having alkyleneoxide chains between them. See Kawamoto, paragraph [0013], particularly page 9, line 18, noting the reaction products of these polyisocyanates and polyols, and paragraph [0014], noting that the polyols include polyethylene glycol and polypropylene glycol. See Kawamoto, page 9, lines 20-22. It is expected that the recitations of polyethylene glycol and polypropylene glycol are expected to mean that there are more than four repeating units in these polymers since tetraethylene glycol is separately referenced. Kawamoto does not limit the molecular weights of these polyethylene glycols and polypropylene glycols. It would have been understood by the ordinary skilled artisan prior the instantly claimed inventions that the polyisocyanates of Kawamoto, page 9, line 18, made with their diisocyanates and glycols require chain termination of each OH with a diisocyanate molecule leaving a polyalkylene glycol based urethane diisocyanate. See Kawamoto, paragraph [0016]. The ordinary skilled artisan would have understood that the description of Kawamoto, paragraph [0012] would give a polyurethane terminated with two (meth)acrylate groups which is a single radical curable polyurethane having ethylenically unsaturated functional groups. Kawamoto discloses the molecular weights of their quaternary ammonium salts as being 100-2300 at paragraph [0020]. The description of Kawamoto, paragraph [0012], is of a single radical curable polyurethane having ethylenically unsaturated functional groups which is a molecule of their general formula (1) having its OH groups each reacted with a molecule of polyisocyanate and having the remaining isocyanate terminal groups reacted with hydroxyl functional (meth)acrylate. Where this polyisocyanate is Kawamoto’s reaction product of polyethylene glycol or polypropylene glycol with their diisocyanates to give isocyanate terminated molecules, the resulting radical curable polyurethane having ethylenically unsaturated functional groups contains two molecules of polyethylene glycol or polypropylene glycol and one molecule of the molecule of general formula (1) of Kawamoto. Additionally, the resulting radical curable polyurethane having ethylenically unsaturated functional groups contains four molecules of the diisocyanate used to make the polyalkylene glycol containing polyisocyanate. Additionally, the resulting radical curable polyurethane having ethylenically unsaturated functional groups contains two molecules of the hydroxyl functional (meth)acrylate. The effects of the chain lengths of polyalkylene glycol on the properties discussed in Kawamoto, paragraphs [0040]-[0041] would have been expected to be similar for polyalkylene glycol chains within Kawamoto’s polyisocyanates. Kawamoto does not disclose the molecular weights of their polyethylene glycol and polypropylene glycol of paragraph [0014]. Ibata discloses making urethane containing polyisocyanates having polyalkylene glycol that is chain terminated with diisocyanates which is useful in curable acrylate terminated polyurethanes at column 1, line 65 to column 2, line 1, column 14, lines 15-24, noting the molecular weight of the polyalkylene glycol of 2000, column 15, lines 5-13, noting the molecular weight of the polyalkylene glycol, column 18, lines 23-30, noting the molecular weight of the polyalkylene glycol, and lines 43-50, noting the molecular weight of the polyalkylene glycol, and lines 64-68, noting the molecular weight of the polyalkylene glycol. It is noted that the above discussed radical curable polyurethane having ethylenically unsaturated functional groups made with the cationic diol of molecular weight 100, polyalkylene glycol of molecular weight 2000, the hexamethylene diisocyanate of Kawamoto, page 9, line 11, and the hydroxyethyl acrylate of Kawamoto, page 12, line 8 would have a molecular weight of (4*168.2)+(2*116.11)+(2*2000)+(100)= 5005 g/mole. Therefore, this molecule would contain 100/5005*100%=1.998 wt% of the isocyanate reactive surfactant, which falls within the scope of the amounts thereof of the instant claims 1, 5, and 17. The above discussed radical curable polyurethane having ethylenically unsaturated functional groups would have 672.8/5005 *100%=13.4 wt.% of diisocyanate which falls within the scope of the instant claims 1 and 17. The above discussed radical curable polyurethane having ethylenically unsaturated functional groups would have 232.2/5005 *100%=4.64 wt.% of hydroxyethyl acrylate which falls within the scope of the instant claim 2. The 2-hydroxylethyl acrylate of Kawamoto falls within the scope of the instant claims 3 and 8 because the 2-hydroxylethyl acrylate of Kawamoto can be made by alkoxylating acrylic acid with ethylene oxide. The exemplified 2-hydroxylethyl acrylate of Kawamoto is therefore necessarily an isocyanate reactive alkoxylated acrylate of the instant claims 3 and 8. Kawamoto discloses the combination of initiator and their radical curable polyurethane having ethylenically unsaturated functional groups at paragraph [0054]. Kawamoto discloses the use of dispersant in their compositions at paragraph [0058]. Dispersant falls within the scope of the non-reactive surfactant of the instant claim 9. Kawamoto, paragraphs [0047] and [0049]-[0050], noting the alkylene oxide modified acrylates of Kawamoto, falls within the scope of the instant claim 11. These alkylene oxide modified acrylates are also the radical reactive surfactants of the instant claim 12 because they have the hydrophilic/hydrophobic alkylene oxide segments and the radically reactive acrylate groups. The substrates coated with the coating compositions of Kawamoto fall within the scope of the instant claims 13 and 18. The similarity of the compositions of Kawamoto to the instantly claimed compositions is such that the compositions of Kawamoto would have been expected to necessarily have the properties of the instantly claimed compositions including the properties of the instant claims 14-16 and 19-20. See MPEP 2112. It would have been obvious to one of ordinary skill in the art prior to the instantly claimed invention to make the above discussed coating compositions and coated substrates of Kawamoto which fall within the scope of the instantly claimed inventions because they are encompassed by Kawamoto, Ibata suggests the use of the above discussed polyalkylene glycol molecular weights in making Kawamoto’s polyisocyanates which are isocyanate terminated polyalkylene glycols, and such compositions of Kawamoto in view of Ibata would have been expected to have the properties of the compositions and coated articles of Kawamoto, including the properties explicitly discussed by Kawamoto and the properties inherent to Kawamoto’s compositions and coated articles. No unexpected result is seen stemming from any difference between the instant claims and Kawamoto which is demonstrated in a manner commensurate in scope with the instant claims and which compares to the closest prior art, e.g. Kawamoto. See MPEP 716.02(d) Unexpected Results Commensurate in Scope With Claimed Invention [R-08.2012]. 4. Claim 10 is rejected under 35 U.S.C. 103 as being unpatentable over JP 2004-143303 Kawamoto et al., the English translation provided by the examiner being referenced below unless otherwise noted, in view of US Pat. No. 4006024 Ibata et al., as applied to claims 1-3, 5-9, and 11-20 in paragraph 3 above, further in view of US Pat. Application Publication No. 2008/0160187 Murata et al. The discussion of paragraph 3 above is repeated here. Kawamoto, paragraph [0058], discloses the addition of pigment and filler, which encompasses the instant claim 10. Kawamoto does not describe the use of the metal oxide nanoparticles of the instant claim 10. Murata discloses using metal oxide particles of average particle size 5-50 nm, which are metal oxide nanoparticles falling within the scope of the instant claim 10, in similar compositions as those of Kawamoto. It would have been obvious to one of ordinary skill in the art prior to the instantly claimed invention to add the metal oxide particles of average particle size 5-50 nm of Murata to the coating compositions of Kawamoto because Kawamoto discloses using pigments and fillers in their compositions and the metal oxide nanoparticles of Murata would have been expected to give the properties they contribute to the compositions of Murata to the compositions of Kawamoto, including reinforcing and hardness properties typical of inorganic fillers. No unexpected result is seen stemming from any difference between the instant claims and Kawamoto which is demonstrated in a manner commensurate in scope with the instant claims and which compares to the closest prior art, e.g. Kawamoto. See MPEP 716.02(d) Unexpected Results Commensurate in Scope With Claimed Invention [R-08.2012]. Conclusion 5. Any inquiry concerning this communication or earlier communications from the examiner should be directed to PATRICK D NILAND whose telephone number is (571)272-1121. The examiner can normally be reached on Monday to Friday from 10 to 5. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Robert S Jones, can be reached at telephone number (571)272-1121. 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 Patent Center. Status information for published applications may be obtained from Patent Center. Status information for unpublished applications is available through Patent Center for authorized users only. Should you have questions about access to Patent Center, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). 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) Form at https://www.uspto.gov/patents/uspto-automated- interview-request-air-form. /PATRICK D NILAND/ Primary Examiner, Art Unit 1762
Read full office action

Prosecution Timeline

Oct 04, 2021
Application Filed
Mar 22, 2024
Non-Final Rejection — §103
Jul 26, 2024
Response Filed
Oct 04, 2024
Final Rejection — §103
Dec 23, 2024
Request for Continued Examination
Dec 29, 2024
Response after Non-Final Action
Feb 20, 2025
Non-Final Rejection — §103
May 27, 2025
Response Filed
Aug 05, 2025
Final Rejection — §103
Dec 15, 2025
Examiner Interview Summary
Dec 15, 2025
Applicant Interview (Telephonic)
Jan 06, 2026
Request for Continued Examination
Jan 11, 2026
Response after Non-Final Action
Jan 24, 2026
Non-Final Rejection — §103 (current)

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

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Prosecution Projections

5-6
Expected OA Rounds
63%
Grant Probability
58%
With Interview (-5.3%)
3y 5m
Median Time to Grant
High
PTA Risk
Based on 1270 resolved cases by this examiner. Grant probability derived from career allow rate.

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