Prosecution Insights
Last updated: October 22, 2026
Application No. 18/455,482

SINGLE BANK RESISTANCE HEATER FOR AN AIR CONDITIONER UNIT

Non-Final OA §103
Filed
Aug 24, 2023
Examiner
BARGERO, JOHN E
Art Unit
3762
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Haier US Appliance Solutions Inc.
OA Round
2 (Non-Final)
55%
Grant Probability
Moderate
2-3
OA Rounds
6m
Est. Remaining
86%
With Interview

Examiner Intelligence

Grants 55% of resolved cases
55%
Career Allowance Rate
330 granted / 596 resolved
-14.6% vs TC avg
Strong +30% interview lift
Without
With
+30.4%
Interview Lift
resolved cases with interview
Typical timeline
3y 8m
Avg Prosecution
30 currently pending
Career history
642
Total Applications
across all art units

Statute-Specific Performance

§101
0.5%
-39.5% vs TC avg
§103
68.7%
+28.7% vs TC avg
§102
17.7%
-22.3% vs TC avg
§112
11.7%
-28.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 596 resolved cases

Office Action

§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 . Response to Arguments Applicant's arguments filed 6/17/2026 have been considered but are moot because the new ground of rejection does not rely on any reference applied in the prior rejection of record for any teaching or matter specifically challenged in the argument. Claim Rejections - 35 USC § 103 The text of those sections of Title 35, U.S. Code not included in this action can be found in a prior Office action. Claims 1-18 are rejected under 35 U.S.C. 103 as being unpatentable over Hunter (US 2024/0283201) and Turner et al. (US 2023/0354477). Regarding claim 1, Hunter (H) discloses a method for operating an air conditioner unit ([0022], PTAC), the method comprising: initiating a resistance heating cycle of the air conditioner unit (208, [0051]); determining a plug personality of a plug of the air conditioner unit, wherein the plug personality is an amperage limit of the plug; determining a nominal voltage rating of the air conditioner unit; determining, based on the plug personality and the nominal voltage rating ([0019]), but does not disclose the determination of a pulse width modulation rate percentage for a single bank resistance heater of the air conditioner unit; and setting, within a memory of a heater controller, the determined pulse width modulation rate percentage for the single bank resistance heater. However, Turner (T), discloses a heating device (Abstract) wherein the controller (9,11,12, [0042], i.e., microprocessor) makes a determination of a pulse width modulation rate percentage for a single bank resistance heater ([0046]); and setting, within a memory of a heater controller (12), the determined pulse width modulation rate percentage for the single bank resistance heater ([0046]). It would have been obvious to one of ordinary skill in the art prior to the effective filing date of this application to utilize a PWM current regulator to control the current to the heating elements in order to prevent damage or overheating to the heating elements. Regarding claim 2, Hunter (H), as modified, discloses the method of claim 1, wherein the determined plug personality corresponds to a first value (H-Figure 7B, [0049]), wherein the determined nominal voltage rating corresponds to a second value, and wherein the determined pulse width modulation rate percentage is based on the first value and the second value ([0032, 0059]). As a clarification, Hunter decerns the target value, whilst Trattler adjusts the duty cycle to reach the desired outcome. Regarding claim 3, Hunter (H), as modified, discloses the method of claim 1, wherein the plug personality is determined to be 15A, 20A, or 30A (H- [0044]). Regarding claim 4, Hunter (H), as modified, discloses the method of claim 3, wherein in response to the plug personality being determined to be 15A a first value is set to ½ ([0046], PWM percentage is calculated and can be from 0-100% depending on the heating requirements.). Regarding claim 5, Hunter (H), as modified, discloses the method of claim 3, wherein in response to the plug personality being determined to be 20A a first value is set to 2/3 ([0046]). Regarding claim 6, Hunter (H), as modified, discloses the method of claim 3, wherein in response to the plug personality being determined to be 30A a first value is set to 1 ([0046]). Regarding claim 7, Hunter (H), as modified, discloses the method of claim 1, wherein the nominal voltage rating is determined to be 230V or 265V (H- Figure 7B). Regarding claim 8, Hunter (H), as modified, discloses the method of claim 7, wherein in response to the nominal voltage rating being determined to be 230V a second value is set to ¾ ([0046]). Regarding claim 9, Hunter (H), as modified, discloses the method of claim 7, wherein in response to the nominal voltage rating being determined to be 265V a second value is set to 1 ([0046]). Regarding claim 10, Hunter (H) discloses an air conditioner unit comprising: a plug ([0044], i.e., NEMA 6-15) for providing an electrical connection to the air conditioner unit (100); a single bank resistance heater for selectively heating a flow of air (208); and a heater controller operable for: initiating a resistance heating cycle of the air conditioner unit; determining a plug personality of the plug, wherein the plug personality is an amperage limit of the plug; determining a nominal voltage rating of the air conditioner unit; determining, based on the plug personality and the nominal voltage rating ([0019, 0044, 0051]), but does not disclose determining a pulse width modulation rate percentage for the single bank resistance heater; and setting the determined pulse width modulation rate percentage for the single bank resistance heater. However, Turner (T), discloses a heating device (Abstract) wherein the controller (9,11,12, [0042], i.e., microprocessor) determines a pulse width modulation rate percentage for the single bank resistance heater ([0046]); and setting the determined pulse width modulation rate percentage for the single bank resistance heater (via 12, [0046]). It would have been obvious to one of ordinary skill in the art prior to the effective filing date of this application to utilize a PWM current regulator to control the current to the heating elements in order to prevent damage or overheating to the heating elements. Regarding claim 11, Hunter (H), as modified, discloses the air conditioner unit of claim 10, wherein the determined plug personality corresponds to a first value, wherein the determined nominal voltage rating corresponds to a second value, and wherein the determined pulse width modulation rate percentage is based on the first value and the second value ([0032, 0059]). As a clarification, Hunter decerns the target value, whilst Trattler adjusts the duty cycle to reach the desired outcome. Regarding claim 12, Hunter (H), as modified, discloses the air conditioner unit of claim 10, wherein the plug personality is determined to be 15A, 20A, or 30A (H- [0044]). Regarding claim 13, Hunter (H), as modified, discloses the air conditioner unit of claim 12, wherein in response to the plug personality being determined to be 15A a first value is set to ½ ([0046], PWM percentage is calculated and can be from 0-100% depending on the heating requirements). Regarding claim 14, Hunter (H), as modified, discloses the air conditioner unit of claim 12, wherein in response to the plug personality being determined to be 20A a first value is set to 2/3 ([0046]). Regarding claim 15, Hunter (H), as modified, discloses the air conditioner unit of claim 12, wherein in response to the plug personality being determined to be 30A a first value is set to 1 ([0046]). Regarding claim 16, Hunter (H), as modified, discloses the air conditioner unit of claim 10, wherein the nominal voltage rating is determined to be 230V or 265V (H- Figure 7B). Regarding claim 17, Hunter (H), as modified, discloses the air conditioner unit of claim 16, wherein in response to the nominal voltage rating being determined to be 230V a second value is set to ¾ ([0046]). Regarding claim 18, Hunter (H), as modified, discloses the air conditioner unit of claim 16, wherein in response to the nominal voltage rating being determined to be 265V a second value is set to 1([0046]). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to JOHN E BARGERO whose telephone number is (571)270-1770. The examiner can normally be reached Monday-Friday. 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) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Helena Kosanovic can be reached at (571) 272-9059. 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. /JOHN E BARGERO/Examiner, Art Unit 3762 /HELENA KOSANOVIC/Supervisory Patent Examiner, Art Unit 3762
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Prosecution Timeline

Aug 24, 2023
Application Filed
Apr 08, 2026
Non-Final Rejection mailed — §103
Jun 17, 2026
Response Filed
Sep 30, 2026
Non-Final Rejection mailed — §103 (current)

Precedent Cases

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

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Prosecution Projections

2-3
Expected OA Rounds
55%
Grant Probability
86%
With Interview (+30.4%)
3y 8m (~6m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 596 resolved cases by this examiner. Grant probability derived from career allowance rate.

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