Prosecution Insights
Last updated: May 04, 2026
Application No. 18/441,127

HEAT EXCHANGER

Final Rejection §102§103
Filed
Feb 14, 2024
Priority
Feb 14, 2023 — RE 10-2023-0019422
Examiner
TRAN, LEN
Art Unit
3763
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
LG Electronics Inc.
OA Round
2 (Final)
11%
Grant Probability
At Risk
3-4
OA Rounds
1y 4m
Est. Remaining
32%
With Interview

Examiner Intelligence

Grants only 11% of cases
11%
Career Allowance Rate
13 granted / 114 resolved
-58.6% vs TC avg
Strong +20% interview lift
Without
With
+20.4%
Interview Lift
resolved cases with interview
Typical timeline
3y 6m
Avg Prosecution
17 currently pending
Career history
131
Total Applications
across all art units

Statute-Specific Performance

§103
50.2%
+10.2% vs TC avg
§102
24.8%
-15.2% vs TC avg
§112
22.0%
-18.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 114 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 . This office action is in response to the filing of 10/8/2025. Applicant's election with traverse of species 1 in the reply filed on 10/18/2025 is acknowledged. The requirement is still deemed proper and is therefore made FINAL. Claim Objections Claim 1 is objected to because of the following informalities: the inner portion identified as 610 in the specification does not overlap the plurality of refrigerant tubes and the outer portion identified as 620 in the specification overlaps the refrigerant tubes as shown in Fig. 6. Appropriate correction is required. 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, 2 are rejected under 35 U.S.C. 102a1 as being anticipated by Niculescu et al. (RO 120359 B1). Niculescu et al. shows a heat exchanger comprising: A plurality of tubes 1 through which a refrigerant flows (page 9, paragraph 4 of the translated version); and a plurality of fins 2 disposed, respectively, between adjacent refrigerant tubes to transfer heat, wherein each of the fins includes: an portion located to overlap the tubes in a vertical direction, and another portion located so as not to overlap the tubes in the vertical direction (see Fig. 1 below), and wherein the lower end of at least a portion of the non-overlapping portion is located higher than a lower end of the overlapping portion. Niculescu et al. PNG media_image1.png 583 537 media_image1.png Greyscale Claim Rejections - 35 USC § 103 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 rejected under 35 U.S.C. 103 as being unpatentable over Niculescu et al. Niculescu et al. shows the non-overlapping section being cut. Niculescu et al. does not show the section as bent, however, such a modification would have involved a mere change in the shape of an object which is generally recognized as being within the level of ordinary skill in the art, and the heat exchanger of Niculescu et al. will still carry out its intended function with the modification. Allowable Subject Matter Claim 3 is objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. Claim 20 is allowed. Claim 20 comprises the allowable material of claim 3 as stated above. Since the election of 10/8/2025 was made with traverse, all non-elected claims must be cancelled when this case goes to allowance. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Davis Hwu whose telephone number is (571)272-4904. Examiner interviews are available via telephone. To schedule an interview, applicant is encouraged to call the examiner or 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, Len Tran can be reached at 571-272-1184. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /DAVIS D HWU/Primary Examiner, Art Unit 3763
Read full office action

Prosecution Timeline

Feb 14, 2024
Application Filed
Oct 22, 2025
Non-Final Rejection — §102, §103
Mar 24, 2026
Response Filed
Apr 23, 2026
Final Rejection — §102, §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12584693
MICROCHANNEL HEAT EXCHANGER
2y 2m to grant Granted Mar 24, 2026
Patent 12551916
CLEANING RECEPTACLE FOR CRYOGENIC FLUID FUELING NOZZLE
2y 9m to grant Granted Feb 17, 2026
Patent 12496477
FIRE SUPPRESSING GAS GENERATORS, SYSTEMS, AND ARRANGEMENTS
2y 4m to grant Granted Dec 16, 2025
Patent 12478993
PAINT-SPRAYING DEVICE FOR PRODUCING A PAINT SPRAY JET AND METHOD FOR VENTING A PAINT CONTAINER
2y 7m to grant Granted Nov 25, 2025
Patent 9545479
SYRINGE ASSIST DEVICE
3y 1m to grant Granted Jan 17, 2017
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

3-4
Expected OA Rounds
11%
Grant Probability
32%
With Interview (+20.4%)
3y 6m (~1y 4m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 114 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month