Prosecution Insights
Last updated: August 18, 2026
Application No. 18/245,721

POLYESTER FILM, AND HEAT-SHRINKABLE LABEL AND PACKAGING MATERIAL COMPRISING SAME

Final Rejection §102§103
Filed
Mar 17, 2023
Priority
Oct 22, 2020 — RE 10-2020-0137685 +1 more
Examiner
FANG, SHANE
Art Unit
1766
Tech Center
1700 — Chemical & Materials Engineering
Assignee
SK Inc.
OA Round
2 (Final)
76%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
95%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allowance Rate
1152 granted / 1509 resolved
+11.3% vs TC avg
Strong +19% interview lift
Without
With
+18.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
69 currently pending
Career history
1569
Total Applications
across all art units

Statute-Specific Performance

§101
0.8%
-39.2% vs TC avg
§103
54.6%
+14.6% vs TC avg
§102
19.8%
-20.2% vs TC avg
§112
12.8%
-27.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1509 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 Response to Amendment The amendment supported by the original disclosure. The text of those sections of Title 35, U.S. Code not included in this action can be found in a prior Office action. The previous restriction and 102 rejections have been maintained, but the position has been modified due to the amendment. Claim Rejections - 35 USC § 102 Claim(s) 1-4, 6-12 and 15-17 is(are) rejected under 35 U.S.C. 102(a)(2)/(a)(1) as being anticipated by Shin et al. (US 20210054140, eff. F/D 4/30/18, WO2019212241 (P/D: 11/07/19, Assignee SKC)) listed on ISR. As to claims 1 and 10-12, Shin (claims, abs., examples, 82-87) discloses a stretched polyester film for producing labels (38-41) comprising terephthalic acid (TPA)//ethylene glycol (EG)/ neopentyl glycol(NPG)/ diethylene glycol (DEG). The polyesters (Table 3, 134-145) of Ex.3-2, 3-3, and 3-4 meet the claimed comonomers and mol% of the comonomers of instant claims 1 and 10-11: PNG media_image1.png 294 988 media_image1.png Greyscale The films have a thickness of 40 microns, identical to that of the polyester film in instant pgpub [0109] and examples. The films (137) are produced via melt-extrusion at 280 °C, which meets the melt-extrusion condition of instant pgpub [0096, 260-300 °C]. The unstretched films (137) are rolled at a speed of 54m/min, which meets the preheating condition of instant pgpub [0097, 50-90 m/min. The films (138) are preheated at 100-110 °C for 0.1 min., which meets the preheating condition of instant pgpub [0098, 90-120 °C, 0.05-1 min.]. The films (138) are stretched 5 times at 76-77 °C in transverse direction, which meets the stretching condition of instant pgpub [0071,0109, 0099, 60-90 °C, 4-5 times, transverse direction] and instant claim 12. The films (138) are annealed (heat setting) at 85 °C, which meets the heat set condition of pgpub [0100]. Regarding the new process limitation of claim 1, claim(s) 1-4, 6-12 and 15-17 is(are) product-by-process claims that are limited by and defined by the product. Determination of patentability is based on the product itself, not 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, 698,277 USPQ 964,966 (Fed. Cir. 1985). See MPEP § 2113. In this case, no material difference has been identified between the claimed and disclosed polyester film. As to claims 9 and 15-17, Shin (32, 38) discloses the polyester film may have a heat shrinkage in the first direction, and specifically the first direction may be the transverse direction. Shin is silent on the claimed properties of Ta-b of claim 1, shrinkage rates (%) of claim 2, SR% of claim 3, maximum expansion rate of claim 4, 1st, 2nd, 3rd, and 4th shrinkage uniformity of claims 4-8 in the claimed formulae. However, the reference teaches a polyester that meets the claimed structures (mol% and comonomers) and a process of making films (extrusion, rolling speed, preheat, stretching, and annealing) comprising thereof indistinguishable from the process recited in instant claims and specifications (see above rejections). In light of this, it appears Shin’s films (Ex. 3-2, 3-3, and 3-4) would inherently exhibit the aforementioned properties. See MPEP § 2112. Response to Arguments The argument for allowance of amended claims has been fully considered but not persuasive. Regarding applicant’s argument (9:3-4) on the new process limitation, the 102 rejection has been modified and the product-by-process rationale has been applied. Applicant’s attack (10-12) on the inherency rationale applied for the rejection appears merely argumentative, because no data has been presented to defeat the rationale. Since the PTO does not have proper means to conduct experiments, the burden of proof is now shifted to applicants to show otherwise. A case indicating that the burden of proof can be shifted to the applicant to show that the subject matter of the prior art does not possess the characteristic relied on whether the rejection is based on inherency under 35 U.S.C. 102 or obviousness under 35 U.S.C. 103. See MPEP § 2184. In re Fitzgerald, 619 F.2d 67, 205 USPQ 594 (CCPA 1980).Therefore, the previous restriction and 102 rejections have been maintained, but the position has been modified due to the amendment. Shin’s films (138) are stretched 5 times, outside the claimed process range but within the range of instant pgpub [0042, 0092, 60-90 °C, 3-5 times, transverse direction]. The Exhibit A is not sufficient to show Shin’s films would not exhibit the claimed properties. The 102 rejection has been modified and the product-by-process rationale has been applied. 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 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 date of this final action. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to SHANE FANG whose telephone number is (571)270-7378. The examiner can normally be reached on Mon-Thurs. 8am-6pm. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Randy Gulakowski can be reached on 571.572.1302. 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. /SHANE FANG/Primary Examiner, Art Unit 1766
Read full office action

Prosecution Timeline

Mar 17, 2023
Application Filed
Jan 30, 2026
Non-Final Rejection mailed — §102, §103
Apr 29, 2026
Response Filed
Jun 26, 2026
Final Rejection mailed — §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

3-4
Expected OA Rounds
76%
Grant Probability
95%
With Interview (+18.8%)
2y 5m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1509 resolved cases by this examiner. Grant probability derived from career allowance rate.

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