Prosecution Insights
Last updated: April 19, 2026
Application No. 18/151,732

LAUNDRY APPLIANCE HAVING A THERMAL STORAGE MECHANISM FOR CAPTURING EXCESS HEAT FROM ONE OR MORE HEAT SOURCES

Non-Final OA §102
Filed
Jan 09, 2023
Examiner
NGUYEN, BAO D
Art Unit
3762
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Whirlpool Corporation
OA Round
1 (Non-Final)
54%
Grant Probability
Moderate
1-2
OA Rounds
3y 5m
To Grant
82%
With Interview

Examiner Intelligence

Grants 54% of resolved cases
54%
Career Allow Rate
197 granted / 366 resolved
-16.2% vs TC avg
Strong +28% interview lift
Without
With
+27.8%
Interview Lift
resolved cases with interview
Typical timeline
3y 5m
Avg Prosecution
14 currently pending
Career history
380
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
53.0%
+13.0% vs TC avg
§102
17.6%
-22.4% vs TC avg
§112
28.1%
-11.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 366 resolved cases

Office Action

§102
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. Election/Restrictions Claims 1-14 and 19 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected Species II and I II , Figure s 2 and 4 , there being no allowable generic or linking claim. Election was made without traverse in the reply filed on 12/09/2025. The independent claim 1 is directed to Species I II , Figure 4 , since a laundry appliance (10, fig. 4) comprising: a blower (16, fig. 4) that directs process air (14, fig. 4) through an airflow path (18, fig. 4); a rotating drum (40, fig. 4) that holds articles to be processed; a heat pump system having a condenser (1 2 , fig. 4 , [0028] ) and an evaporator (108, fig. 4, [0028]) , wherein the evaporator (108, fig. 4, [0028]) dehumidifies the process air (14, fig. 4) delivered from the drum (40, fig. 4) and wherein the condenser (12, fig. 4, [0028]) heats the process air (14, fig. 4) delivered from the evaporator (108, fig. 4, [0028]) ; and a phase change material (26, fig. 4) that retains heat from the condenser (12, fig. 4, [0028]) that is directed away from the process air (14, fig. 4) to define captured heat, and wherein the captured heat of the phase change material (26, fig. 4) is utilized during a subsequent laundry cycle which is found in Species I II . Therefore, claim s 1 -14 were withdrawn from consideration. 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 15-18 and 20 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Stolze et al. (US 9,752,275; hereinafter Stolze ). Regarding claim 15 , Stolze shows a laundry appliance (1, figure) comprising: a blower (5, figure) that directs process air through an airflow path (6, figure); a rotating drum (2, figure) that holds articles to be processed; a heat exchange system (7, 10, 15, 16, 17, figure) having a heating assembly (7, figure), wherein the heating assembly (7, figure) generates heat that is delivered into the process air delivered from a processing space (interior space of item 2, figure) defined within the rotating drum (2, figure); and a phase change material (12, figure; PCM (phase change material), col. 9, lines 16-38) that retains heat from the heating assembly (7, figure) that is directed away from the process air to define captured heat (col. 9, line 4 through col. 10, line 41), and wherein the captured heat of the phase change material (12, figure; PCM (phase change material), col. 9, lines 16-38) is utilized during a subsequent laundry cycle (col. 9, line 4 through col. 10, line 41). Regarding claim 16 , Stolze shows wherein during the subsequent laundry cycle (col. 9, line 4 through col. 10, line 41), the captured heat from the phase change material (12, figure; PCM (phase change material), col. 9, lines 16-38) and heat from the heating assembly (7, figure) cooperate to deliver a combined heat to the process air (col. 9, line 4 through col. 10, line 41). Regarding claim 17 , Stolze shows wherein the heating assembly (7, figure) includes an electrically resistive heating element (electric resistive heater 7 as shown in figure, col. 9, lines 4-15). Regarding claim 18 , Stolze shows wherein the heating assembly (1, figure) includes a condenser (9, figure). Regarding claim 20 , Stolze shows a method for operating a laundry appliance (1, figure), the method comprising steps of: activating a blower (5, figure) that delivers process air through an airflow path (6, figure); activating at least one heater (7, figure) that is in thermal communication with the airflow path (6, figure) wherein heat from the at least one heater (6, figure) is delivered into the airflow path (6, figure); capturing excess thermal energy from the at least one heater (7, figure) within a phase change material (12, figure; PCM (phase change material), col. 9, lines 16-38) to define captured heat; storing the captured heat for a period of time (col. 9, line 4 through col. 10, line 41); activating a subsequent laundry cycle (col. 9, line 4 through col. 10, line 41); and delivering process air into thermal communication (via item 9, figure) with the phase change material (12, figure; PCM (phase change material), col. 9, lines 16-38) to transfer the captured heat from the phase change material (12, figure; PCM (phase change material), col. 9, lines 16-38) to the process air for increasing a temperature of the process air (col. 9, line 4 through col. 10, line 41). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to FILLIN "Examiner name" \* MERGEFORMAT BAO D NGUYEN whose telephone number is FILLIN "Phone number" \* MERGEFORMAT (571)270-5141 . The examiner can normally be reached FILLIN "Work Schedule?" \* MERGEFORMAT Monday-Friday, 8:00am - 5:00pm EST . 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, FILLIN "SPE Name?" \* MERGEFORMAT Michael Hoang can be reached at FILLIN "SPE Phone?" \* MERGEFORMAT 5712726460 . 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. /BAO D NGUYEN/ Patent Examiner, Art Unit 3762 /MICHAEL G HOANG/ Supervisory Patent Examiner, Art Unit 3762
Read full office action

Prosecution Timeline

Jan 09, 2023
Application Filed
Mar 25, 2026
Non-Final Rejection — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12582209
FLUFFING AND STYLING NOZZLE AND HAIR DRYER
2y 5m to grant Granted Mar 24, 2026
Patent 12559879
LAUNDRY TREATING APPARATUS
2y 5m to grant Granted Feb 24, 2026
Patent 12559880
DRYER APPLIANCE AND INFUSER ASSEMBLY
2y 5m to grant Granted Feb 24, 2026
Patent 12553169
SYSTEMS AND METHODS FOR ENERGY MANAGEMENT OF AN APPLIANCE DURING A POWER INTERRUPTION
2y 5m to grant Granted Feb 17, 2026
Patent 12553173
APPLIANCE WITH RELIABLE INFORMATION OF A DRYING CYCLE
2y 5m to grant Granted Feb 17, 2026
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
82%
With Interview (+27.8%)
3y 5m
Median Time to Grant
Low
PTA Risk
Based on 366 resolved cases by this examiner. Grant probability derived from career allow rate.

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