Prosecution Insights
Last updated: April 19, 2026
Application No. 18/546,552

SWITCHABLE FILM, LAMINATED GLAZING, AND METHOD OF PRODUCING SWITCHABLE FILM

Non-Final OA §102§103
Filed
Aug 15, 2023
Examiner
NGUYEN, LAUREN
Art Unit
2871
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Carlex Glass America LLC
OA Round
1 (Non-Final)
54%
Grant Probability
Moderate
1-2
OA Rounds
3y 5m
To Grant
90%
With Interview

Examiner Intelligence

Grants 54% of resolved cases
54%
Career Allow Rate
549 granted / 1007 resolved
-13.5% vs TC avg
Strong +36% interview lift
Without
With
+35.5%
Interview Lift
resolved cases with interview
Typical timeline
3y 5m
Avg Prosecution
74 currently pending
Career history
1081
Total Applications
across all art units

Statute-Specific Performance

§103
63.0%
+23.0% vs TC avg
§102
30.3%
-9.7% vs TC avg
§112
5.6%
-34.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1007 resolved cases

Office Action

§102 §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 . DETAILED ACTION Notice of Pre-AIA or AIA Status 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. Election/Restrictions Applicant’s election with traverse of Group IIB1 (figures 3 and 7; claims 1-2 and 7-20) in the reply filed on 11/14/2025 is acknowledged. The traversal is on the ground(s) that the species are not distinct species and are sufficiently related that search and examination of both species could be carried out by the PTO without posing an undue burden on the Examiner. This is not found persuasive because claims 3-6 are directed to multiple species. Therefore, search and examination of both species could not be carried out by the PTO without posing an undue burden on the Examiner. The requirement is still deemed proper and is therefore made FINAL. Specification The title of the invention is not descriptive. A new title is required that is clearly indicative of the invention to which the claims are directed. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 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. Claims 1, 7-8, 11-17, 19-20 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Liu et al. (CN 206282057). Regarding claim 1, Liu et al. (figures 1-6) discloses a switchable film, sequentially comprising: a first substrate (12); a first conductive layer (22); a switchable material layer (PDLC 3); a second conductive layer (21); and a second substrate (11), wherein the first substrate (12) includes a first cut out portion (102) wherein the first cut out portion aligns entirely with the second substrate (11; figure 2); wherein a first busbar (flexible flat cable 20; figure 3) is formed on the first conductive layer on the first substrate and a second busbar (flexible flat cable 20; figure 3) is formed on the second conductive layer on the second substrate within the first cut out portion of the first substrate (The flat cable bonding areas 221, 211 are exposed and the flexible flat cable 20 of an external flexible printed circuit (FPC) can be electrically connected so that the polymer dispersed liquid crystal composite layer 10 can be made flexible by the FPC The cable 20 is electrically connected to an external driving circuit so that the external driving circuit can drive the driving power through the upper transparent conductive layer 21 and the lower transparent conductive layer 22 to drive the PDLC layer 3; see at least page 5, 4th paragraph), and wherein a first barrier (encapsulation layer 4; see at least page 4, the last two paragraphs) is positioned around the first cut out portion of the first substrate (figure 3). Regarding claim 7, Liu et al. (figures 1-6) discloses wherein the switchable material layer is a liquid crystal material (PDLC 3; see at least page 5, 3rd paragraph). Regarding claim 8, Liu et al. (figures 1-6) discloses wherein the switchable material layer is a polymer dispersed liquid crystal (PDLC 3; see at least page 5, 3rd paragraph). Regarding claim 11, Liu et al. (figures 1-6) discloses wherein the first barrier is a tape (The encapsulation layer 4 is a colloid, and UV glue is applied to the periphery or the periphery of the PDLC layer 3 between the upper transparent conductive layer 21 and the lower transparent conductive layer 22 in a syringe-filled manner with UV glue, and is applied to the transparent substrate and then the so-called encapsulation layer 4 is formed by heating and hardening; see at least page 4, last paragraph). Regarding claim 12, Liu et al. (figures 1-6) discloses wherein the first barrier is a resin (The encapsulation layer 4 is a colloid, and UV glue is applied to the periphery or the periphery of the PDLC layer 3 between the upper transparent conductive layer 21 and the lower transparent conductive layer 22 in a syringe-filled manner with UV glue, and is applied to the transparent substrate and then the so-called encapsulation layer 4 is formed by heating and hardening; see at least page 4, last paragraph). Regarding claim 13, Liu et al. (figures 1-6) discloses wherein the resin is a cured product of a multiple component material (The encapsulation layer 4 is a colloid, and UV glue is applied to the periphery or the periphery of the PDLC layer 3 between the upper transparent conductive layer 21 and the lower transparent conductive layer 22 in a syringe-filled manner with UV glue, and is applied to the transparent substrate and then the so-called encapsulation layer 4 is formed by heating and hardening; see at least page 4, last paragraph). “[E]ven though product-by-process claims are limited by and defined by the process, determination of patentability is based on the product itself. The patentability of a product does not depend on its method of production. If the product in the product-by-process claim is the same as or obvious from a product of the prior art, the claim is unpatentable even though the prior product was made by a different process.” In re Thorpe, 777 F.2d 695, 698, 227 USPQ 964, 966 (Fed. Cir. 1985). See MPEP §2113. Regarding claim 14, Liu et al. (figures 1-6) discloses wherein the resin is a cured product of an ultraviolet curable material or a thermally curable material (The encapsulation layer 4 is a colloid, and UV glue is applied to the periphery or the periphery of the PDLC layer 3 between the upper transparent conductive layer 21 and the lower transparent conductive layer 22 in a syringe-filled manner with UV glue, and is applied to the transparent substrate and then the so-called encapsulation layer 4 is formed by heating and hardening; see at least page 4, last paragraph). “[E]ven though product-by-process claims are limited by and defined by the process, determination of patentability is based on the product itself. The patentability of a product does not depend on its method of production. If the product in the product-by-process claim is the same as or obvious from a product of the prior art, the claim is unpatentable even though the prior product was made by a different process.” In re Thorpe, 777 F.2d 695, 698, 227 USPQ 964, 966 (Fed. Cir. 1985). See MPEP §2113. Regarding claim 15, Liu et al. (figures 1-6) discloses wherein the resin is a solidified thermoplastic material (The encapsulation layer 4 is a colloid, and UV glue is applied to the periphery or the periphery of the PDLC layer 3 between the upper transparent conductive layer 21 and the lower transparent conductive layer 22 in a syringe-filled manner with UV glue, and is applied to the transparent substrate and then the so-called encapsulation layer 4 is formed by heating and hardening; see at least page 4, last paragraph). “[E]ven though product-by-process claims are limited by and defined by the process, determination of patentability is based on the product itself. The patentability of a product does not depend on its method of production. If the product in the product-by-process claim is the same as or obvious from a product of the prior art, the claim is unpatentable even though the prior product was made by a different process.” In re Thorpe, 777 F.2d 695, 698, 227 USPQ 964, 966 (Fed. Cir. 1985). See MPEP §2113. Regarding claim 16, Liu et al. (figures 1-6) discloses wherein the first busbar and the second busbar are aligned along the same edge of the switchable film (3 and 20; figure 3). Regarding claim 17, Liu et al. (figures 1-6) discloses wherein the first busbar and the second busbar run parallel to each other (20; figure 3). Regarding claim 19, Liu et al. (figures 1-6) discloses a first connector attached to the first busbar and a second connector attached to the second busbar (portions of 20; figure 3). Regarding claim 20, Liu et al. (figures 1-6) discloses laminated glazing comprising: a first glass sheet (40; see at least page 4, 9th paragraph); a first adhesive interlayer (PVB 50; figure 6; see at least page 5, last paragraph); a switchable film comprising a first substrate (12); a first conductive layer (22); a switchable material layer (PDLC 3); a second conductive layer (21); and a second substrate (11), wherein the first substrate (12) includes a first cut out portion (102) wherein the first cut out portion aligns entirely with the second substrate (11; figure 2); wherein a first busbar (flexible flat cable 20; figure 3) is formed on the first conductive layer on the first substrate and a second busbar (flexible flat cable 20; figure 3) is formed on the second conductive layer on the second substrate within the first cut out portion of the first substrate (The flat cable bonding areas 221, 211 are exposed and the flexible flat cable 20 of an external flexible printed circuit (FPC) can be electrically connected so that the polymer dispersed liquid crystal composite layer 10 can be made flexible by the FPC The cable 20 is electrically connected to an external driving circuit so that the external driving circuit can drive the driving power through the upper transparent conductive layer 21 and the lower transparent conductive layer 22 to drive the PDLC layer 3; see at least page 5, 4th paragraph), and wherein a first barrier (encapsulation layer 4; see at least page 4, the last two paragraphs) is positioned around the first cut out portion of the first substrate (figure 3). a second adhesive interlayer (PBV 50; figure 6; see at least page 5, last paragraph); and a second glass sheet (30; see at least page 4, 9th paragraph). 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. Claim 2 is rejected under 35 U.S.C. 103 as being unpatentable over Liu et al. (CN 206282057) in view of Kurokawa et al. (US 2019/0079323). Regarding claim 2, Liu et al. (figures 1-6) discloses wherein a second barrier is positioned around the second substrate and the switchable material layer (encapsulation layer 4; see at least page 4, the last two paragraphs). However, Liu et al. is silent regarding wherein the second substrate is smaller than the first substrate such that the first substrate extends beyond the second substrate along an entire edge of the second substrate. Kurokawa et al. (figure 2) teaches wherein the second substrate is smaller than the first substrate such that the first substrate extends beyond the second substrate along an entire edge of the second substrate (SUB1 and SUB2, figure 2). Therefore, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify the substrates as taught by Kurokawa et al. in order to suppress degradation in display quality. Claims 9, 10, and 18 are rejected under 35 U.S.C. 103 as being unpatentable over Liu et al. (CN 206282057) in view of Klein et al. (US 2021/0268774). Regarding claim 9, Liu et al. discloses the limitation as shown in the rejection of claim 1 above. However, Liu et al. is silent regarding the first busbar the second busbar each have a width in the range of 4 mm to 8 mm. It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to have the widths of the first busbar the second busbar to be in the range of 4 mm to 8 mm, since it has been held that where the general conditions of a claim, including are disclosed in the prior art, discovering the optimum or workable ranges involves only routine skill in the art, In re Aller, 105 USPQ 233 (C.C.P.A. 1955). Regarding claim 10, Liu et al. discloses the limitation as shown in the rejection of claim 1 above. However, Liu et al. is silent regarding wherein the first barrier has a width of from 2 mm to 8 mm. It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to have the width of the first barrier to be from 2 mm to 8 mm, since it has been held that where the general conditions of a claim, including are disclosed in the prior art, discovering the optimum or workable ranges involves only routine skill in the art, In re Aller, 105 USPQ 233 (C.C.P.A. 1955). Regarding claim 18, Liu et al. discloses the limitation as shown in the rejection of claim 1 above. However, Liu et al. is silent regarding wherein the first cut out portion of the first substrate has a width of from 10 mm to 15 mm. It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to have the width the first cut out portion of the first substrate to be from 10 mm to 15 mm, since it has been held that where the general conditions of a claim, including are disclosed in the prior art, discovering the optimum or workable ranges involves only routine skill in the art, In re Aller, 105 USPQ 233 (C.C.P.A. 1955). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to LAUREN NGUYEN whose telephone number is (571)270-1428. The examiner can normally be reached on Monday - Thursday, 8:00 AM -6:00 PM. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Jennifer Carruth, can be reached at 571-272-9791. 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. /LAUREN NGUYEN/Primary Examiner, Art Unit 2871
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Prosecution Timeline

Aug 15, 2023
Application Filed
Jan 23, 2026
Non-Final Rejection — §102, §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

1-2
Expected OA Rounds
54%
Grant Probability
90%
With Interview (+35.5%)
3y 5m
Median Time to Grant
Low
PTA Risk
Based on 1007 resolved cases by this examiner. Grant probability derived from career allow rate.

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