Prosecution Insights
Last updated: April 19, 2026
Application No. 18/028,387

WATER SUPPLY MECHANISM AND AUTOMATIC CLEANING APPARATUS

Final Rejection §103
Filed
Mar 24, 2023
Examiner
FORDJOUR, SARAH AKYAA
Art Unit
3723
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
BEIJING ROBOROCK INNOVATION TECHNOLOGY CO., LTD.
OA Round
2 (Final)
54%
Grant Probability
Moderate
3-4
OA Rounds
2y 12m
To Grant
85%
With Interview

Examiner Intelligence

Grants 54% of resolved cases
54%
Career Allow Rate
71 granted / 132 resolved
-16.2% vs TC avg
Strong +31% interview lift
Without
With
+30.9%
Interview Lift
resolved cases with interview
Typical timeline
2y 12m
Avg Prosecution
53 currently pending
Career history
185
Total Applications
across all art units

Statute-Specific Performance

§101
1.0%
-39.0% vs TC avg
§103
53.1%
+13.1% vs TC avg
§102
25.9%
-14.1% vs TC avg
§112
14.7%
-25.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 132 resolved cases

Office Action

§103
DETAILED ACTION Water Supply Mechanism and Automatic Cleaning Apparatus 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 Amendment The amendments filed 09-30-2025 has been entered. Claims 1-6,11,13-23 are currently pending and have been examined. Claims 12 and 24 have been cancelled. Applicant’s amendments overcome the drawing objections previously set forth in the Non-Final Office action mailed 06-30-2025. The previous rejection has been updated due to the applicant’s amendments. Response to Arguments Applicant’s arguments filed 09-30-2025, with respect to the rejection(s) of claim(s) 1 and 13 their dependent claims under 35 U.S.C.102 have been fully considered but are moot because the new ground of rejection (as necessitated by amendment) relies on a different combination of prior art references, not applied in the prior rejection of record to teach the amendments. 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. This application includes one or more claim limitations that do not use the word “means,” but are nonetheless 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 a generic placeholder that is coupled with functional language without reciting sufficient structure to perform the recited function and the generic placeholder is not preceded by a structural modifier. Such claim limitation(s) is/are: water return mechanism and power mechanism in claims 16 and 17. Examiner is interpreting the water return mechanism as a water absorbing roller and a recycle rod as disclosed in applicant specification (see para 00143 and 00147) or equivalent structure. Examiner is interpreting the power mechanism as a motor and power transmission as disclosed in applicant specification (see para 00163) or equivalent structure. Because this/these claim limitation(s) is/are being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, it/they is/are being interpreted to cover the corresponding structure described in the specification as performing the claimed function, and equivalents thereof. If applicant does not intend to have this/these limitation(s) interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, applicant may: (1) amend the claim limitation(s) to avoid it/them being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph (e.g., by reciting sufficient structure to perform the claimed function); or (2) present a sufficient showing that the claim limitation(s) recite(s) sufficient structure to perform the claimed function so as to avoid it/them being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph. 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. Claim(s) 1-6,11,12-14,16-23 is/are rejected under 35 U.S.C. 103 as being unpatentable over Johnson et al (US20190290089A1) in view of Li (US20190274508A1) and Al (CN10369011A). Regarding claim 1, Johnson teaches a water outlet device (para 0103,0118), wherein the water outlet device (para 0103-0104,0118) is connected to a cleaning liquid outlet (para 0103) of a clean water tank of the wet cleaning assembly (451, figure 23) , and a cleaning liquid in the clean water tank flows to the water outlet device (para 0103-0105,0118) through the cleaning liquid outlet of the clean water tank (para 0092-0104) and is transported to a surface to be cleaned through the water outlet device (para 0103-0105); wherein the cleaning assembly further comprises a dirty water tank (444, figure 21; para 0092), and a water absorbing amount of the dirty water tank (para 0105-0106) a clean water pump of the clean water tank (0104-0105). However, Johnson fails to teach a sewage pump, and the water absorbing amount of sewage pump of the dirty water tank is greater than a water discharging amount of a clean water pump of the clean water tank. Johnson does disclose that recovery system for removing liquid can be formed with different components (see para 0105). Li teaches a cleaning device (abstract) that performs sweeping and mopping where the devices have a clean water pump (54, para 0029,0034) and a sewage pump (55 para 0029,0035). It would have been obvious to one of ordinary skill in the art before effective filing date of the claimed invention to have modified Johnson to include a sewage pump based on the teachings of Li. This modification would help allow for better control the wastewater recovery process. Al teaches a cleaning device that has improved absorbing sewage efficiency, by including additional sewage absorption devices. (abstract). It would have been obvious to one of ordinary skill in the art before effective filing date of the claimed invention to have modified Johnson to include water absorbing amount of that is greater than a water discharging amount of a clean water based on the teachings of Al. This modification would help improve wastewater absorption. Further, modified Johnson would disclose a sewage pump, and the water absorbing amount of sewage pump of the dirty water tank is greater than a water discharging amount of a clean water pump of the clean water tank. (see Li abstract, para 0029, 0034-0035 & Al abstract) Regarding claim 2, modified Johnson teaches the water outlet device ( see Johnson para 0103) is provided with a distributor (see Johnson 452, para 0103), and the distributor is configured to uniformly apply the cleaning liquid onto the surface to be cleaned. Regarding claim 3, modified Johnson teaches the distributor comprises at least one of a continuous opening (see Johnson Para 0103 distributor has a least has one continuous opening) and a combination of several small disconnected openings (see Johnson para 0103 describes that distributor can include multiple distributor outlets). Regarding claim 4, modified Johnson teaches distributor comprises at least one of a nozzle, water dripping hole (see Johnson para 0103 discloses distributor has opening to allow fluid to exit), or a soaked cloth. Regarding claim 5, modified Johnson teaches the water outlet device (see Johnson para 0103-0105,0118) is provided with a connection port ( see Johnson 435, para 0104), and the water outlet device (see Johnson para 0103-0105,0118 describes fluid path of liquid ) is connected to the cleaning liquid outlet of the clean water tank (see Johnson 451, figure 23 para 0092-00105) through the connection port. Regarding claim 6, modified Johnson teaches wherein the clean water pump (see Johnson 453, para 0103-0104) is communicated with the cleaning liquid outlet of the clean water tank. Regarding claim 11, modified Johnson teaches a clean water pump pipe ( see Johnson 436, para 0104), wherein the clean water pump (see Johnson 453, para 0104) is communicated with the cleaning liquid outlet of the clean water tank ( see Johnson 451, figure 23 0092-00105) through the clean water pump pipe (see Johnson para 0118). Regarding claim 13, Johnson teaches a mobile platform (412, figures 18-20) and a wet cleaning assembly (para 0092,0094-0110) wherein the wet cleaning assembly comprises a water supply mechanism (“fluid delivery system” 0103-0104,0118); wherein the water supply mechanism comprises a water outlet device (para 0103-0104,0118) connected to a cleaning liquid outlet (para 0103) of a clean water tank of the wet cleaning assembly (451, figure 23; 0092-0104), and a cleaning liquid flows to the water outlet device (para 0103-0105,0118) through the cleaning liquid outlet of the clean water tank (446, para 0092-0104) and is transported to a surface to be cleaned through the water outlet device (para 0103); wherein the cleaning assembly further comprises a dirty water tank (444, figure 21; para 0092), and a water absorbing amount of the dirty water tank (para 0105-0106) a clean water pump of the clean water tank (0104-0105). However, Johnson fails to teach a sewage pump, and the water absorbing amount of sewage pump of the dirty water tank is greater than a water discharging amount of a clean water pump of the clean water tank. Johnson does disclose that recovery system for removing liquid can be formed with different components (see para 0105). Li teaches a cleaning device (abstract) that performs sweeping and mopping where the devices have a clean water pump (54, para 0029,0034) and a sewage pump (55 para 0029,0035). It would have been obvious to one of ordinary skill in the art before effective filing date of the claimed invention to have modified Johnson to include a sewage pump based on the teachings of Li. This modification would help allow for better control the wastewater recovery process. Al teaches a cleaning device that has improved absorbing sewage efficiency, by including additional sewage absorption devices. (abstract). It would have been obvious to one of ordinary skill in the art before effective filing date of the claimed invention to have modified Johnson to include water absorbing amount of that is greater than a water discharging amount of a clean water based on the teachings of Al. This modification would help improve wastewater absorption. Further, modified Johnson would disclose a sewage pump, and the water absorbing amount of sewage pump of the dirty water tank is greater than a water discharging amount of a clean water pump of the clean water tank. (see Li abstract, para 0029, 0034-0035 & Al abstract) Regarding claim 14, modified Johnson teaches the water supply mechanism(see Johnson “fluid delivery system” 0103-0104,0118; figures 18-23); is connected to the mobile platform (see Johnson 412, figure 18 and 20). Regarding claim 16, modified Johnson teaches the wet cleaning assembly (see Johnson para 0092,0094-0110) further comprises at least one cleaning head (see Johnson dirty inlet and 489, para 0108), a water return mechanism (see Johnson “recovery system” and 441; para 0092 0105-0106,0108) the cleaning head is configured to clean the surface to be cleaned, the water return mechanism is configured to collect a dirty cleaning liquid on the surface to be cleaned, and the clean water tank (see Johnson 451, para 0092-0104) is configured to store the cleaning liquid. Regarding claim 17, modified Johnson teaches the wet cleaning assembly further comprises a power mechanism (see Johnson para 0041,0048,0090 0101,0112 brushroll motor) configured to drive the wet cleaning assembly to move relative to the mobile platform. Regarding claim 18, modified Johnson teaches the water outlet device (see Johnson para 0103) is provided with a distributor (see Johnson 452, para 0103), and the distributor is configured to uniformly apply the cleaning liquid onto the surface to be cleaned. Regarding claim 19, modified Johnson teaches wherein the distributor comprises at least one of a continuous opening and a combination of several small disconnected openings. (see Johnson para 0103). Regarding claim 20, modified Johnson teaches wherein the distributor comprises at least one of a nozzle, a water dripping hole (see Johnson para 0103 discloses distributor has hole to allow fluid to exit), and a soaked cloth. Regarding claim 21, modified Johnson teaches the water outlet device ( see Johnson para 0103-0105,0118) is provided with a connection port (see Johnson 435, para 0104), and the water outlet device (see Johnson para 0103-0105,0118 describes fluid path of liquid ) is connected to the cleaning liquid outlet of the clean water tank (see Johnson 451 para 0092-0105) through the connection port. Regarding claim 22, Johnson teaches wherein the clean water pump (see Johnson 453, para 0092-0106) is communicated with the cleaning liquid outlet of the clean water tank. Regarding claim 23, modified Johnson teaches a clean water pump pipe (see Johnson 436, para 0104), wherein the clean water pump (see Johnson 453, para 0104) is communicated with the cleaning liquid outlet of the clean water tank through the clean water pump pipe (see Johnson para 0118). Claim(s) 15 is rejected under 35 U.S.C. 103 as being unpatentable over Johnson et al (US20190290089A1) in view of Li (US20190274508A1) and Al (CN10369011A) as applied to claim 13 in view of Chen (CN207886173U). Regarding claim 15, Johnson as modified above teaches all limitations stated above, but fails to teach the water supply mechanism is connected to the mobile platform through a lifting mechanism. Chen discloses cleaning appliance (abstract) that includes water supply mechanism (8,figure 2) is connected to the mobile platform (3, figure 2) through a lifting mechanism (5 and 15, figures 1-2). It would have been obvious to one of ordinary skill in the art before effective filing date of the claimed invention to have modified Johnson’s so that the water supply mechanism is connected to the mobile platform through a lifting mechanism based on the teachings of Chen. This modification would help allow apparatus to perform different cleaning functions (see abstract). Conclusion THIS ACTION IS MADE FINAL. Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to SARAH AKYAA FORDJOUR whose telephone number is (571)272-0390. The examiner can normally be reached Monday - Thursday 9:30am - 5:30pm and Friday 6:00am-3:00pm. 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, Monica Carter can be reached at 571-272-4475. 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. /SARAH AKYAA FORDJOUR/Examiner, Art Unit 3723 /MONICA S CARTER/Supervisory Patent Examiner, Art Unit 3723
Read full office action

Prosecution Timeline

Mar 24, 2023
Application Filed
Jun 23, 2025
Non-Final Rejection — §103
Sep 30, 2025
Response Filed
Feb 10, 2026
Final Rejection — §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

3-4
Expected OA Rounds
54%
Grant Probability
85%
With Interview (+30.9%)
2y 12m
Median Time to Grant
Moderate
PTA Risk
Based on 132 resolved cases by this examiner. Grant probability derived from career allow rate.

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