Prosecution Insights
Last updated: October 01, 2026
Application No. 18/665,016

WATER FILTRATION SYSTEM INCLUDING A MODULAR FLOW METER FOR AN APPLIANCE

Non-Final OA §103
Filed
May 15, 2024
Examiner
PERRIN, CLARE M
Art Unit
Tech Center
Assignee
Haier US Appliance Solutions Inc.
OA Round
1 (Non-Final)
68%
Grant Probability
Favorable
1-2
OA Rounds
6m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 68% — above average
68%
Career Allowance Rate
521 granted / 766 resolved
+8.0% vs TC avg
Strong +43% interview lift
Without
With
+42.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
32 currently pending
Career history
791
Total Applications
across all art units

Statute-Specific Performance

§101
1.3%
-38.7% vs TC avg
§103
43.1%
+3.1% vs TC avg
§102
14.0%
-26.0% vs TC avg
§112
33.7%
-6.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 766 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 . Claim Status Claims 1-18 are pending. 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. 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. Claims 1-18 are rejected under 35 U.S.C. 103 as being unpatentable over Butorin et al. (U.S. Patent Publication # 2024/0317606), hereinafter “Butorin”. With respect to claims 1 and 10, Butorin teaches a water filtration system comprising one or more filter cartridges 20 (Figs. 13, 14; Paragraphs [0083-0094]) for a refrigerator appliance 10 (“domestic appliance”), the refrigerator appliance 10 (“domestic appliance”) comprising one or more cartridge head assemblies 30 (“a receiving compartment”) (see Fig. 12; Paragraphs [0076, 0078, 0090]), the water filtration system comprising: a filter cartridge body 20 defining an axial direction, a radial direction, and a circumferential direction (see Figs. 13, 14; Paragraphs [0084, 0085]), the filter body comprising one or more electrical connectors 70 (Paragraph [0074]) including a first body electrical contact configured to transfer electrical signals between the domestic appliance and the filter body (see Paragraphs [0072, 0075, 0079, 0091]) and a second body electrical contact positioned opposite the first body electrical contact (see Fig. 7, which shows electrical connectors 70,70a opposite electrical connectors 70, 70c in an axial direction), the second body electrical contact being electrically connected with the first body electrical contact (Paragraphs [0072-0083, 0087, 0088, 0091]); and flow sensor 86 (“measurement module”) removably coupled to the filter body at a first axial end thereof (see Figs. 13, 14: Paragraphs [0084-0091], which describe various embodiments where the placement of flow sensor 86 and portions thereof can be positioned inside or outside the filter cartridge, and/or before or after filtration), the measurement module being connectable to the refrigerator applicant 10 (“domestic appliance”) (Paragraph [0091]); the measurement module comprising: a module electrical contact selectively coupled with one of the one or more electrical connectors 70 (“the second body electrical contact”) at a selected location to transfer electrical signals between the measurement module and the filter body (see Figs. 13, 14: Paragraphs [0084-0091]); and flow sensor 86 (“a fluid flow measuring device”) configured to determine an amount of water (“fluid”) passing through the filter cartridge(s) 20 (“filtration system”), the fluid flow measuring device receiving electrical power from the domestic appliance via the filter body (see Paragraphs [0078-0084, 0087]). Although Butorin does not specifically teach one embodiment that meets all the limitations of claims 1 and 10, Butorin teaches configurations of the measurement module/flow meter and filter cartridge (which are electrically connected) in which the flow meter/measurement module is connectable to the filter cartridge 20, as discussed above. It would have been obvious to the ordinary artisan to select these embodiments from those disclosed by Butorin, as the teachings represent a finite number of identified, predictable combinations. KSR Int'l Co. v. Teleflex, Inc., 550 U.S. 398 (2007). With respect to claims 2, 3, 11, and 12, Butorin teach that the flow sensor 86 (“measurement module”) comprises portions 86a and 86b, wherein 86a is a flow meter positioned in the flow of raw water (“fluidly coupled to the raw water inlet”) into the filter cartridge and portion 86b is positioned after the flow of water passes through the filter cartridge, such that the measurement module has a raw water inlet and treated water outlet (see Paragraphs [0084, 0090]; Figs. 13, 14). With respect to claims 4, 5, 13, and 14, in a separate embodiment, Butorin teaches that the measurement module further comprises: a bypass valve 31 fluidly coupled between the raw water inlet and the treated water outlet (see Figs. 8, 12-14; Paragraphs [0057-0063]), the bypass valve 31 selectively directing fluid from the raw water inlet to the treated water outlet to bypass the filter body, wherein flow meter 86a is positioned upstream from the bypass valve31 along the raw water inlet (see (see Figs. 8, 12-14; Paragraphs [0084-0090]). It would have been obvious to the ordinary artisan to consider the additional embodiments including the bypass valve of Butorin, in order to optimize flow through the water filter system. With respect to claims 6 and 15, Butorin teaches wherein the measurement module at least partially surrounds the filter body along the radial direction such that the filter body is selectively inserted into the measurement module along the axial direction when the measurement module 86 is positioned prior to filtration (Paragraph [0090]; see Figs. 1, 5). Butorin (Paragraphs [0094-0091]) discloses various embodiments where the placement of flow sensor 86 and portions thereof can be positioned inside or outside the filter cartridge, and/or before or after filtration), the measurement module being connectable to the refrigerator applicant 10 (“domestic appliance”) (Paragraph [0091]). It would have been obvious to the ordinary artisan to consider the additional embodiments including the bypass valve of Butorin, in order to optimize flow through the water filter system. With respect to claims 7 and 16, Butorin teaches wherein the module electrical contact comprises one or more electronic connectors associated with one or more electronic devices 78 (see Paragraphs [0072-0074]), wherein it would have been obvious to the ordinary artisan that the plurality of module electrical contacts are spaced apart from each other along the circumferential direction at least in part upon examination of the electronic devices 78 and their associated circuits (see Paragraphs [0072-0074]; Fig. 11, 13). With respect to claims 8 and 17, Butorin teaches wherein the fluid flow measuring device is configured to transmit an electrical signal to the refrigerator 10 (“domestic appliance”), the electrical signal comprising the amount of fluid passing through the water filtration system (see Paragraphs [0085, 0095]). With respect to claims 9 and 18, Butorin teaches wherein the module electrical contact is provided along an inner circumferential surface of the measurement module (see flow meter 86 positioned on an inner surface of circumferential filter cartridge 20 in Figs. 13, 14). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to CLARE M PERRIN whose telephone number is (571)270-5952. The examiner can normally be reached 9AM-6PM EST M-F. 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, Bob Ramdhanie can be reached at (571) 270-3240. 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. /CLARE M. PERRIN/ Primary Examiner Art Unit 1779 /CLARE M PERRIN/ Primary Examiner, Art Unit 1779 18 September 2026
Read full office action

Prosecution Timeline

May 15, 2024
Application Filed
Sep 23, 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

1-2
Expected OA Rounds
68%
Grant Probability
99%
With Interview (+42.7%)
2y 11m (~6m remaining)
Median Time to Grant
Low
PTA Risk
Based on 766 resolved cases by this examiner. Grant probability derived from career allowance rate.

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