Prosecution Insights
Last updated: July 17, 2026
Application No. 18/564,100

METHOD FOR REGENERATING RESIN OF A WATER SOFTENING PLANT

Non-Final OA §102§103
Filed
Nov 26, 2023
Priority
May 30, 2022 — CN 202210605788.3 +1 more
Examiner
MILLER-CRUZ, EKANDRA S.
Art Unit
1773
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Midea Group Co., Ltd.
OA Round
1 (Non-Final)
66%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 66% — above average
66%
Career Allowance Rate
222 granted / 339 resolved
+0.5% vs TC avg
Strong +52% interview lift
Without
With
+52.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
42 currently pending
Career history
378
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
89.4%
+49.4% vs TC avg
§102
1.6%
-38.4% vs TC avg
§112
6.7%
-33.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 339 resolved cases

Office Action

§102 §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 1-15 are pending: Claims 1-7, 9-10 and 13-15 are rejected. Claims 8 and 11-12 have been withdrawn. Priority Acknowledgment is made of applicant’s claim for foreign priority under 35 U.S.C. 119 (a)-(d). The certified copy has been filed in parent Application No. CN202210605788, filed on 05/30/2022. 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. Claims 1-2, 5 and 13 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Li (CN 110436569). Regarding claim 1, Li teaches a method for regenerating resin of a water softening plant (an intelligent water softener and control method having a regeneration process, see ABS), wherein the method comprises: controlling a backwashing assembly to suck a salt solution from a salt tank to wash the resin in a resin tank in the water softening plant through the salt solution (“(3) back washing the resin tank: after regeneration, because part of the salt water and a portion of the contaminants residue present in the resin tank 6, then need to clean. when cleaning, the bypass valve 14 and the flexible valve 15 is opened, inlet valve 13 and the salt tank electromagnetic valve 8 closed. raw water slowly into the resin tank 6 through the inlet conduit 1 via bypass valve 14 and the flexible valve 15, the sewage tank is discharged by the drainage pipe 4. at the same time, collecting and comparing the water quality data of the water quality sensor 12 and drain water sensor 17, when the parameter of the two are the same, it can judge almost reverse washing, stopping the cleaning process”, see pg. 7 and Fig. 1); in accordance with a determination that washing of the resin by the salt solution is completed, controlling the backwashing assembly to connect the resin tank with a raw water waterway, so as to obtain raw water from the raw water waterway to wash the resin in the resin tank (“(4) washing the resin tank the water inlet electromagnetic valve and the bypass electromagnetic valve is opened, the soft water electromagnetic valve is closed, the user uses straight-through hard water soft water pipeline via a bypass electromagnetic valve is composed of a water inlet pipeline, the raw water enters the resin tank washing by water inlet electromagnetic valve, the waste water after washing is discharged from the pipeline, at the same time, collecting and comparing the water quality sensor and drain water sensor of water quality data, when the TDS parameter of the two are the same, but the ratio the ratio of TDS and conductivity data collected by the drain water sensor is less than corresponding to the water quality sensor, ending washing, entering the ice state”, see pg. 7). The reasonable interpretation under BRI for “raw water waterway” is a water pipeline, this limitation is met because Li teaches water inlet pipe 1/water inlet conduit 1 carrying raw water. Regarding claim 2, Li teaches the method for regenerating resin of a water softening plant according to claim 1, wherein controlling the backwashing assembly to connect the resin tank with the raw water waterway to obtain raw water from the raw water waterway to wash the resin in the resin tank comprises: controlling the backwashing assembly to start backwashing process by connecting a lower drain port of a water distribution pipe extending to a bottom of the resin tank in the backwashing assembly with the raw water waterway, so as to obtain raw water from the raw water waterway to backwash the resin of the resin tank (“raw water slowly into the resin tank 6 through the inlet conduit 1 via bypass valve 14 and the flexible valve 15, the sewage tank is discharged by the drainage pipe 4. at the same time, collecting and comparing the water quality data of the water quality sensor 12 and drain water sensor 17, when the parameter of the two are the same, it can judge almost reverse washing, stopping the cleaning process”, see pg. 7 and Fig. 1). Regarding claim 5, Li teaches the method for regenerating resin of a water softening plant according to claim 1, wherein controlling the backwashing assembly to connect the resin tank with the raw water waterway to obtain raw water from the raw water waterway to wash the resin in the resin tank comprises: controlling the backwashing assembly to start forward washing process by connecting an upper drain port disposed above the resin in the backwashing assembly with the raw water waterway, so as to obtain raw water from the raw water waterway for forward washing the resin in the resin tank (“raw water slowly into the resin tank 6 through the inlet conduit 1 via bypass valve 14 and the flexible valve 15, the sewage tank is discharged by the drainage pipe 4. at the same time, collecting and comparing the water quality data of the water quality sensor 12 and drain water sensor 17, when the parameter of the two are the same, it can judge almost reverse washing, stopping the cleaning process”, see pg. 7 and Fig. 1). Further, the valve head and associated flow passages located above the resin jar 6 shown in Fig. 1 inherently constitute the claimed upper drain port, because the during washing operation raw water is introduced through the valve held into the resin jar 56 and flows downward through the resin bed while wastewater exists through the drain line. Regarding claim 13, Li teaches the method for regenerating resin of a water softening plant according to claim 2, wherein controlling the backwashing assembly to connect the resin tank with the raw water waterway to obtain raw water from the raw water waterway to wash the resin in the resin tank comprises: controlling the backwashing assembly to start forward washing process by connecting an upper drain port disposed above the resin in the backwashing assembly with the raw water waterway, so as to obtain raw water from the raw water waterway for forward washing the resin in the resin tank (“raw water slowly into the resin tank 6 through the inlet conduit 1 via bypass valve 14 and the flexible valve 15, the sewage tank is discharged by the drainage pipe 4. at the same time, collecting and comparing the water quality data of the water quality sensor 12 and drain water sensor 17, when the parameter of the two are the same, it can judge almost reverse washing, stopping the cleaning process”, see pg. 7 and Fig. 1). Further, the valve head and associated flow passages located above the resin jar 6 shown in Fig. 1 inherently constitute the claimed upper drain port, because the during washing operation raw water is introduced through the valve held into the resin jar 56 and flows downward through the resin bed while wastewater exists through the drain line. 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. This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. Claims 3, 6 and 14 are rejected under 35 U.S.C. 103 as being unpatentable over Li (CN 110436569) in view of Maekawa (JP 2011110503) and further in view of Huang (CN 207903951). Regarding claim 3, Li teaches the method for regenerating resin of a water softening plant according to claim 2. Li does not teach that the method further comprises: in accordance with a determination that a washing duration of the backwashing process has reached a first preset duration, controlling the backwashing assembly to stop the backwashing process. In a related field of endeavor, Maekawa teaches water softener (see ABS) comprising a method in accordance with a determination that a washing duration of the backwashing process has reached a first preset duration (“[a]s a result of the determination, when the count value Ta of the timer A reaches 10 days or more”, see pgs. 6-7;“when the elapsed time after the regeneration operation of the ion exchange resin is less than 5 days”, see pgs. 6-7 and Figs. 2 and 4; starts counting the timer A for the regeneration operation and supplies the water softening tank 2 to the water softening tank 2, see pg. 8), controlling the backwashing assembly to stop the backwashing process (“interval of the cleaning operation accompanying the continuation of the non-water passage state of the water softening tank 2 is configured to be performed in a short span”, see pg. 10). Regarding claims 3 and 6, it would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to modify the washing/backwashing processes of Li by incorporating a timer-controlled termination of the washing/backwashing processes as disclosed by Maekawa because it provides consistent operation and reduced operation intervention (Maekawa, see pg. 9). Regarding claim 6, Li teaches the method for regenerating resin of a water softening plant according to claim 5. Li does not teach that the method further comprises: in accordance with a determination that a washing duration of the forward washing process has reached a second preset duration, controlling the backwashing assembly to stop the forward washing process. In a related field of endeavor, Maekawa teaches water softener (see ABS) comprising a method in accordance with a determination that a washing duration of the forward washing process has reached a second preset duration (“[a]s a result of the determination, when the count value Ta of the timer A reaches 10 days or more”, see pgs. 6-7;“when the elapsed time after the regeneration operation of the ion exchange resin is less than 5 days”, see pg. 6-7 and Figs. 2 and 4; starts counting the timer A for the regeneration operation and supplies the water softening tank 2 to the water softening tank 2, see pg. 8), controlling the backwashing assembly to stop the forward washing process (“interval of the cleaning operation accompanying the continuation of the non-water passage state of the water softening tank 2 is configured to be performed in a short span”, see pg. 10). Regarding claim 14, Li and Maekawa teach the method for regenerating resin of a water softening plant according to claim 3, wherein controlling the backwashing assembly to connect the resin tank with the raw water waterway to obtain raw water from the raw water waterway to wash the resin in the resin tank comprises: controlling the backwashing assembly to start forward washing process by connecting an upper drain port disposed above the resin in the backwashing assembly with the raw water waterway, so as to obtain raw water from the raw water waterway for forward washing the resin in the resin tank (Li, “raw water slowly into the resin tank 6 through the inlet conduit 1 via bypass valve 14 and the flexible valve 15, the sewage tank is discharged by the drainage pipe 4. at the same time, collecting and comparing the water quality data of the water quality sensor 12 and drain water sensor 17, when the parameter of the two are the same, it can judge almost reverse washing, stopping the cleaning process”, see pg. 7 and Fig. 1). Further, the valve head and associated flow passages located above the resin jar 6 shown in Fig. 1 of Li inherently constitute the claimed upper drain port, because the during washing operation raw water is introduced through the valve held into the resin jar 56 and flows downward through the resin bed while wastewater exists through the drain line. Claims 4 and 15 are rejected under 35 U.S.C. 103 as being unpatentable over Li (CN 110436569) in view of Maekawa (JP 2011110503) and further in view of Huang (CN 207903951). Regarding claim 4, Li and Maekawa teach the method for regenerating resin of a water softening plant according to claim 3. The combination does not teach wherein the method further comprises: in accordance with a determination that the salt content of wastewater discharged in the backwashing process is less than a first preset value, controlling the backwashing assembly to stop the backwashing process. In a related field of endeavor, Haung teaches a failed resin regeneration device (see ABS) comprising a step in accordance with a determination that the salt content of wastewater discharged in the backwashing process is less than a first preset value, controlling the backwashing assembly to stop the backwashing process (after liquid inlet, the solution tank is filled with salt water removing, adjusting the related valve, through the pump from failed resin the salt-removing water tank upper water inlet, lower part of the drainage, washing, after washing for a period of time, adjusting the related valve, backwashing water until the conductivity is less than 2us/cm. stopping cleaning. the acid liquid and failed resin in the flowing process to exchange, improving the regeneration capacity, after feeding the washing acid water by washing and backwashing are carried out alternately, reducing the labor intensity, shortening the regeneration time, see pg. 3). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to modify the conductivity/salt concentration of Li during washing and backwashing operations and terminate or transition operations when the conductivity fell below a predetermined threshold as disclosed by Haung because it ensures adequate regeneration while reducing water consumption and regeneration time (Haung, see pg. 3). Regarding claim 15, Li, Maekawa and Haung teach the method for regenerating resin of a water softening plant according to claim 4, wherein controlling the backwashing assembly to connect the resin tank with the raw water waterway to obtain raw water from the raw water waterway to wash the resin in the resin tank comprises: controlling the backwashing assembly to start forward washing process by connecting an upper drain port disposed above the resin in the backwashing assembly with the raw water waterway, so as to obtain raw water from the raw water waterway for forward washing the resin in the resin tank (Li, “washing, the water inlet electromagnetic valve 13 and the bypass valve 14 opened, the soft water valve 15 is closed. At this time the user is composed of a water inlet pipeline 1 via bypass valve 14 through the soft water pipeline 3 of hard water and washing water into the resin tank by inlet water electromagnetic valve 13 6, and discharged from the drain 4. at the same time, collecting and comparing the water quality data of the water quality sensor 12 and draining the water quality sensor 17, the ratio of the TDS and conductivity data when the TDS parameter of the two are the same, but the drain water sensor 17 collecting in less ratio corresponds to water quality sensor 12, it may be concluded soft almost reach the use requirement, ending the washing. the system enters the water production state”, see pg. 7 and Fig. 1). Further, the valve head and associated flow passages located above the resin jar 6 shown in Fig. 1 of Li inherently constitute the claimed upper drain port, because the during washing operation raw water is introduced through the valve held into the resin jar 56 and flows downward through the resin bed while wastewater exists through the drain line. Claim 7 is rejected under 35 U.S.C. 103 as being unpatentable over Li (CN 110436569) in view of Huang (CN 207903951). Regarding claim 7, Li teaches the method for regenerating resin of a water softening plant according to claim 5. Li does not teach that the method further comprises: in accordance with a determination that the salt content of wastewater discharged in the forward washing process is less than a second preset value, controlling the backwashing assembly to stop the forward washing process. In a related field of endeavor, Haung teaches a failed resin regeneration device (see ABS) comprising a step in accordance with a determination that the salt content of wastewater discharged in the backwashing process is less than a first preset value, controlling the backwashing assembly to stop the backwashing process (after liquid inlet, the solution tank is filled with salt water removing, adjusting the related valve, through the pump from failed resin the salt-removing water tank upper water inlet, lower part of the drainage, washing, after washing for a period of time, adjusting the related valve, backwashing water until the conductivity is less than 2us/cm. stopping cleaning. the acid liquid and failed resin in the flowing process to exchange, improving the regeneration capacity, after feeding the washing acid water by washing and backwashing are carried out alternately, reducing the labor intensity, shortening the regeneration time, see pg. 3). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to modify the conductivity/salt concentration of Li during washing and backwashing operations and terminate or transition operations when the conductivity fell below a predetermined threshold as disclosed by Haung because it ensures adequate regeneration while reducing water consumption and regeneration time (Haung, see pg. 3). Claims 9-10 are rejected under 35 U.S.C. 103 as being unpatentable over Li (CN 110436569) in view of Maekawa (JP 2011110503) and further in view of Zan (CN 110465333). Regarding claims 9-10, Li teaches the water softening plant according to claim 1. Li does not teach (1) an electronic device, comprising a processor and a memory storing a computer program, wherein, the method for regenerating resin of a water softening plant is implemented when the computer program is executed by the processor; (2) a computer-readable storage medium on which a computer program is stored, wherein, the method for regenerating resin of a water softening plant is implemented when the computer program is executed by a processor. In a related field of endeavor, Zan teaches a resin regeneration method (see ABS) comprising an electronic device having a processor (processor 30) and a memory (memory 40) storing a computer program (one or more programs 41), wherein, the method for regenerating resin is implemented when the computer program is executed by the processor (see pg. 3); and a computer-readable storage medium (computer readable storage medium, see pg. 7) on which a computer program is stored, wherein, the method for regenerating resin is implemented when the computer program is executed by a processor (see claim 13). It would have been obvious to one of ordinary skill in the art before the effective filing date of invention to modify the method of Li by incorporating an electronic having process and memory, and a computer-readable storage medium as disclosed by Zan because it helps to avoid too frequent regeneration control resin, caused by regeneration salt waste (Zan, see pg. 3). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to EKANDRA S. MILLER-CRUZ whose telephone number is (571)270-7849. The examiner can normally be reached M-Th 7 am - 6 pm 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, Benjamin L. Lebron can be reached at (571) 272-0475. 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. /EKANDRA S. MILLER-CRUZ/Primary Examiner, Art Unit 1773
Read full office action

Prosecution Timeline

Nov 26, 2023
Application Filed
Jun 10, 2026
Non-Final Rejection mailed — §102, §103 (current)

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Prosecution Projections

1-2
Expected OA Rounds
66%
Grant Probability
99%
With Interview (+52.2%)
2y 6m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 339 resolved cases by this examiner. Grant probability derived from career allowance rate.

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