Prosecution Insights
Last updated: April 19, 2026
Application No. 18/245,721

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

Non-Final OA §102
Filed
Mar 17, 2023
Examiner
FANG, SHANE
Art Unit
1766
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Skc Co. Ltd.
OA Round
1 (Non-Final)
76%
Grant Probability
Favorable
1-2
OA Rounds
2y 6m
To Grant
95%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allow Rate
1136 granted / 1491 resolved
+11.2% vs TC avg
Strong +19% interview lift
Without
With
+19.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
51 currently pending
Career history
1542
Total Applications
across all art units

Statute-Specific Performance

§101
0.4%
-39.6% vs TC avg
§103
43.9%
+3.9% vs TC avg
§102
24.3%
-15.7% vs TC avg
§112
16.5%
-23.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1491 resolved cases

Office Action

§102
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 All the references cited in the International Search Report have been considered. The most pertinent of these references have been applied below. Election/Restrictions The applicant has elected Group I (claims 1-12 and 15-17) without traverse. This restriction is made FINAL. See previous action for the reasons of applying restriction. 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. (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) 1-12 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]. 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. 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. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Randy Gulakowski can be reached on 571.572.1302. 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 24, 2026
Non-Final Rejection — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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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
76%
Grant Probability
95%
With Interview (+19.0%)
2y 6m
Median Time to Grant
Low
PTA Risk
Based on 1491 resolved cases by this examiner. Grant probability derived from career allow rate.

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