Prosecution Insights
Last updated: May 29, 2026
Application No. 18/829,911

INDOOR UNIT OF HVAC APPARATUS, AND HVAC APPARATUS

Non-Final OA §102§103
Filed
Sep 10, 2024
Priority
Sep 28, 2023 — CN 202322672470.X
Examiner
ZERPHEY, CHRISTOPHER R
Art Unit
3799
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Midea Group Co. Ltd.
OA Round
1 (Non-Final)
48%
Grant Probability
Moderate
1-2
OA Rounds
1y 5m
Est. Remaining
67%
With Interview

Examiner Intelligence

Grants 48% of resolved cases
48%
Career Allowance Rate
369 granted / 761 resolved
-21.5% vs TC avg
Strong +19% interview lift
Without
With
+18.7%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
42 currently pending
Career history
810
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
90.9%
+50.9% vs TC avg
§102
2.8%
-37.2% vs TC avg
§112
4.9%
-35.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 761 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 . Claim Interpretation The following is a quotation of 35 U.S.C. 112(f): (f) Element in Claim for a Combination. – An element in a claim for a combination may be expressed as a means or step for performing a specified function without the recital of structure, material, or acts in support thereof, and such claim shall be construed to cover the corresponding structure, material, or acts described in the specification and equivalents thereof. The following is a quotation of pre-AIA 35 U.S.C. 112, sixth paragraph: An element in a claim for a combination may be expressed as a means or step for performing a specified function without the recital of structure, material, or acts in support thereof, and such claim shall be construed to cover the corresponding structure, material, or acts described in the specification and equivalents thereof. The claims in this application are given their broadest reasonable interpretation using the plain meaning of the claim language in light of the specification as it would be understood by one of ordinary skill in the art. The broadest reasonable interpretation of a claim element (also commonly referred to as a claim limitation) is limited by the description in the specification when 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, is invoked. As explained in MPEP § 2181, subsection I, claim limitations that meet the following three-prong test will be interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph: (A) the claim limitation uses the term “means” or “step” or a term used as a substitute for “means” that is a generic placeholder (also called a nonce term or a non-structural term having no specific structural meaning) for performing the claimed function; (B) the term “means” or “step” or the generic placeholder is modified by functional language, typically, but not always linked by the transition word “for” (e.g., “means for”) or another linking word or phrase, such as “configured to” or “so that”; and (C) the term “means” or “step” or the generic placeholder is not modified by sufficient structure, material, or acts for performing the claimed function. Use of the word “means” (or “step”) in a claim with functional language creates a rebuttable presumption that the claim limitation is to be treated in accordance with 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph. The presumption that the claim limitation is interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, is rebutted when the claim limitation recites sufficient structure, material, or acts to entirely perform the recited function. Absence of the word “means” (or “step”) in a claim creates a rebuttable presumption that the claim limitation is not to be treated in accordance with 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph. The presumption that the claim limitation is not interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, is rebutted when the claim limitation recites function without reciting sufficient structure, material or acts to entirely perform the recited function. Claim limitations in this application that use the word “means” (or “step”) are being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, except as otherwise indicated in an Office action. Conversely, claim limitations in this application that do not use the word “means” (or “step”) are not being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, except as otherwise indicated in an Office action. The following limitation(s) is/are being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, because the claim limitation(s) uses means or a generic placeholder that is coupled with functional language without reciting sufficient structure to perform the recited function and the means or generic placeholder is not preceded by a structural modifier. “a refrigerant detection device” includes the generic/nonce term “device” coupled with the function of “refrigerant detection”. A return to the specification provides [0040] “30: refrigerant detection device; 31: body; 32: first installation plate; 33: second installation plate; 321: first sub installation plate; 322: second sub installation plate; 323: first installation hole; 331: third sub installation plate; 332: fourth sub installation plate; 333: second installation hole;.” Therefor the limitation is interpreted as the same or equivalents thereof. Claim Rejections - 35 USC § 102 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 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) 1-3 and 11-13 is/are rejected under 35 U.S.C. 102(a)(2) as being anticipated by Epperson et al (US 12,117,191). Regarding claims 1 and 11, Epperson discloses an indoor unit of an HVAC apparatus comprising: a shell (202) including a plurality of shell plates that enclose to form an accommodation chamber having an installation area, the plurality of shell plates including a shell bottom plate and a shell side plate; a heat exchange assembly (206), arranged in the accommodation chamber; and a refrigerant detection device (210), arranged in the installation area and configured to detect refrigerant that leaks from the heat exchange assembly; wherein a first distance between the refrigerant detection device and the shell bottom plate is smaller than or equal to 1/3 of a height of the shell, and a second distance between the refrigerant detection device and a shell side plate is smaller than or equal to 1/3 of a width of the shell (shown in figures 2 and 3). Regarding claims 2 and 12, Epperson discloses the first distance or the second distance is smaller than or equal to 110mm (13:36-14:52). Regarding claims 3 and 13, Epperson discloses a water receiving tray (208), at least partially arranged at the shell bottom plate or the shell side plate. Claim Rejections - 35 USC § 103 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 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. The factual inquiries for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. Claim(s) 4-5 and 14-15 is/are rejected under 35 U.S.C. 103 as being unpatentable over Epperson et al (US 12,117,191) in view of Tsuji et al (US 12,072,129). Regarding claims 4 and 14, Epperson discloses the refrigerant detection device includes: a body (210) but lacks installation plates as claimed. Tsuji discloses a refrigerant leakage detector having a first installation plate and a second installation plate that protrude out of the body, are connected to each other, and intersect with each other (see annotated figure below). It would have been obvious to one of ordinary skill in the art to have provided Epperson with the installation plate as taught by Tsuji in order to protect the sensor from the surrounding environment. PNG media_image1.png 484 725 media_image1.png Greyscale Regarding claims 5 and 15, Epperson and Tsuji further discloses the body includes a side plate member and a bottom plate member that are connected to each other and intersect with each other; the first installation plate protrudes out of the side plate member and is coplanar with the side plate member; and the second installation plate protrudes out of the bottom plate member and is coplanar with the bottom plate member (features identified in annotated figure above). Claim(s) 6-10 and 16-20 is/are rejected under 35 U.S.C. 103 as being unpatentable over Epperson et al (US 12,117,191), in view of Tsuji et al (US 12,072,129), and in view of Eskew et al (US 11,428,435). Regarding claims 6 and 16, Epperson discloses the heat exchange assembly (208) includes a heat exchanger. Epperson lacks that the refrigerant detection device is fixedly connected to the heat exchanger through the first installation plate or the second installation plate. Eskew discloses are refrigerant detection device is fixedly connected to the heat exchanger through an installation plate. It would have been obvious to one of ordinary skill in the art to have mounted the sensor to the heat exchanger as taught by Eskew in order to detect leaked refrigerant, in particular refrigerant tends to leak from brazed joints of the system, like are found at heat exchanger turns. Increasing proximity leaks may be detected more effectively. Regarding claims 7 and 17, Epperson, as modified, discloses the heat exchanger includes a first side plate and a second side plate that intersect with each other and are connected to each other; and the refrigerant detection device is fixedly connected to the first side plate or the second side plate (Eskew shows the device connected to side plate 122 which intersects with side plates 112 and 114). Regarding claims 8 and 18, Epperson, as modified, discloses a connection bracket connected to the heat exchanger; wherein the first installation plate or the second installation plate is fixedly connected to the connection bracket (130 of Eskew is a bracket mounted to the heat exchanger, Tsuji provides an installation plate). Regarding claims 9 and 19, Epperson, as modified, discloses the connection bracket includes a first connection plate and a second connection plate that are connected to each other and intersect with each other; the first connection plate is fixedly connected to the first installation plate or the second installation plate; and the second connection plate is fixedly connected to the heat exchanger (130 of Eskew provides a plurality of plates that intersect and connect to the heat exchanger). PNG media_image2.png 667 814 media_image2.png Greyscale Regarding claims 10 and 20, Epperson, as modified, discloses a first positioning side plate is provided on a side of the first connection plate that is away from the second connection plate, and the first positioning side plate and the first connection plate are connected to each other and intersect with each other; and/or a second positioning side plate is provided on a side of the second connection plate that is away from the first connection plate, and the second positioning side plate and the second connection plate are connected to each other and intersect with each other (104 of Eskew provides a plurality of plates that intersect and connect to the heat exchanger). Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Birnkrant (US 12,379,308) leak sensor mounting Brown et al (US 2026/0085853) leak sensor mounting Petele et al (US 2023/0117306) leak sensor bracket Kojima (US 12,130,044) leak sensor location Obara et al (US 10,634,404) leak sensor lean sensor bracket Petele et al (US 12,196,432) leak sensor mounting bracket De (US 11,674,727) leak sensor for reoriented unit West et al (US 12,276,575) leak sensor bracket Alphonso (US 12,078,380) leak sensor bracket Any inquiry concerning this communication or earlier communications from the examiner should be directed to CHRISTOPHER R ZERPHEY whose telephone number is (571)272-5965. The examiner can normally be reached M-F 7:00-4:00 PM. 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, Jianying Atkisson can be reached at 5712707740. 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. /CHRISTOPHER R ZERPHEY/Primary Examiner, Art Unit 3799
Read full office action

Prosecution Timeline

Sep 10, 2024
Application Filed
Apr 03, 2026
Non-Final Rejection mailed — §102, §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12624883
ICE-MAKING COMPARTMENT FOR AN APPLIANCE
2y 5m to grant Granted May 12, 2026
Patent 12623510
TRI-GENERATION TURBOMACHINE DEVICE AND VEHICLE COMPRISING SUCH A DEVICE
2y 8m to grant Granted May 12, 2026
Patent 12616403
THERMALLY INSULATED CONTAINER AND MAGNETOSPINOGRAPH USING SAME
2y 5m to grant Granted May 05, 2026
Patent 12618231
SELF-ADAPTIVE MULTI-MODE DEVICE FOR HIGH-EFFICIENCY AND ALL-WEATHER WATER HARVESTING FROM AIR
1y 10m to grant Granted May 05, 2026
Patent 12613061
REEFER CONTAINER
2y 0m to grant Granted Apr 28, 2026
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

1-2
Expected OA Rounds
48%
Grant Probability
67%
With Interview (+18.7%)
3y 2m (~1y 5m remaining)
Median Time to Grant
Low
PTA Risk
Based on 761 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