Prosecution Insights
Last updated: October 04, 2026
Application No. 17/522,778

DIALYSIS SYSTEM AND METHODS

Final Rejection §103
Filed
Nov 09, 2021
Priority
Nov 09, 2020 — provisional 63/111,360
Examiner
PEO, JONATHAN M
Art Unit
1779
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Outset Medical Inc.
OA Round
6 (Final)
48%
Grant Probability
Moderate
7-8
OA Rounds
0m
Est. Remaining
96%
With Interview

Examiner Intelligence

Grants 48% of resolved cases
48%
Career Allowance Rate
220 granted / 456 resolved
-16.8% vs TC avg
Strong +48% interview lift
Without
With
+48.1%
Interview Lift
resolved cases with interview
Typical timeline
3y 9m
Avg Prosecution
48 currently pending
Career history
501
Total Applications
across all art units

Statute-Specific Performance

§101
0.8%
-39.2% vs TC avg
§103
58.0%
+18.0% vs TC avg
§102
10.8%
-29.2% vs TC avg
§112
29.2%
-10.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 456 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 . Response to Arguments Applicant's arguments filed June 16, 2026 have been fully considered but they are not persuasive. Amendments to the current set of claims have changed the scope of the claimed invention, but a modification of the previous prior art rejection still reads upon the claims, using newly found secondary reference Orhan et al., (“Orhan”, US 2012/0273354). On pages 5-6 of the Remarks section as indicate by the page number at the bottom of each page, Applicant first discusses the status of the Information Disclosure Statements filed. The Examiner indicates that all filed IDSes have been reviewed and considered with this Action. On pages 5-6, Applicant then discusses the previous 103 rejections, noting that the rejections for independent Claim 1 and its dependent claims are moot due to the cancellation of said claims. Next, Applicant argues that the previous prior art references cited for independent Claim 10 do not disclose the added limitations to the claims. The Examiner notes that Jansson discloses a plurality of flow paths and a dialysis fluid pump, and that newly found secondary reference Orhan et al., (“Orhan”, US 2012/0273354), discloses placing a pump for each flow path as further demonstrated in the prior art rejection section for Claim 10 below. Thus, these remarks are considered moot, including the remarks for dependent Claim 12. 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. Claim(s) 10, 11, 13, 16, 20 & 21 is/are rejected under 35 U.S.C. 103 as being obvious over Jansson et al., (“Jansson”, WO00/57935A1), in view of Ritson et al., (“Ritson”, WO 2018/035520), in further view of Gerber et al., (“Gerber”, US 2012/0277552), in further view of Orhan et al., (“Orhan”, US 2012/0273354). Claims 10, 11, 13, 16, 20 & 21 are directed to a disposable container configured to facilitate real-time dialysis fluid production, a device or apparatus type invention group. Regarding Claims 10, 11, 13, 16, 20 & 21, Jansson discloses a disposable container configured to facilitate real-time dialysis fluid production, (Disposable Concentrate Container 402, See Figure 1, 5 & 15, See page 32, lines 6-29, Jansson), comprising: at least one powder compartment in the disposable container configured to hold a powdered dialysis fluid component; at least one liquid compartment in the disposable container configured to hold a liquid dialysis fluid component; (Compartments 416, 408, 410, 420, 418, 412 & 414 in Container 402, See Figure 5, 10 & 11, See page 62, lines 35-38, page 63, lines 1-9, See page 8, lines 28-31, page 23, lines 14-20), a container-side connector interface extending from the disposable container, (Chassis 401 extending from Container 402, See Figure 5), and configured to mate with a machine-side connector interface of a dialysis machine, (Chassis 401 of Container 402 to Manifold 404 of Module 400 inside Dialysis Machine 100, See Figure 1, 5, 15, See page 30, lines 1-4, page 31, lines 35-38, page 32, lines 1-10 and See page 41, lines 20-24, page 62, lines 35-38, See page 66, lines 25-31, page 68, lines 16-38, page 69, lines 11-32, Jansson), the container-side connector including a valve opening member associated with an inlet flow path in the container-side connector interface, the valve opening member being configured to interact with the machine-side connector interface to open a valve in a singular outlet channel of the machine-side connector interface, (Cleaning Agent Valve 480 or Disinfection Valve 498, See Figure 15, 11 & 5, and See page 104, lines 32-38, page 105, lines 1-14, and See page 107, lines 30-38, page 108, lines 1-29; alternatively Air Vent Valve 496 is opened after rinsing/disinfection is finished, See Figure 15 & 5, See page 76, lines 6-38, page 77, lines 1-3); the inlet flow path in the container-side connector interface being selectively fluidly coupled to the outlet channel of the machine-side connector interface and to allow for fluid from the dialysis machine through the connector interface to the at least one powder compartment, through the valve in the outlet channel when the container-side connector interface is coupled to the machine-side connector interface, (At least Channels 430 fluidly connected to Line 4a, See Figure 5, See page 67, lines 4-10, page 77, lines 34-38, page 78, lines 1-6, See page 39, lines 6-31, See page 74, lines 4-12, lines 22-25, lines 35-38, page 75, line 1, Jansson; and a plurality of outlet flow paths in the container-side connector interface configured to deliver dialysis fluid from the at least one powder compartment and the at least one liquid compartment to the machine-side connector interface, (Manifold 404 connects to Container 402 via Channels 426/430/434, See Figure 5, See page 67, lines 4-10, lines 23-29, page 68, lines 28-34, Jansson), a plurality of inlet flow paths in the machine-side connector interface configured to be fluidly coupled to the plurality of outlet flow paths in the container-side connector interface, (Channels 426 and Output Channels 430 for each Compartment, See Figure 5, See page 66, lines 32-36, page 67, lines 7-10, lines 22-37), each of the flow channels being joined to a primary purified water stream, (Channels 426 and Output Channels 430 for each Compartment, See Figure 5, See page 66, lines 32-36, page 67, lines 7-10, lines 22-37; water is directed through channels 426 to contact infusate/concentrate/powder), and connected to a dialysis fluid pump for delivery for dialysis therapy, (Pump 352 on Line 4b, See Figure 4, See page 53, lines 24-37, page 56, lines 15-20). Jansson does not disclose the inlet flow path being a singular inlet flow path being fluidly coupled to the outlet flow path being a singular outlet channel configured to allow for delivery of purified water when the valve is opened by the valve opening member, in which the valve opening member engages with the vale to open the valve when the container-side connector interface is mated to the machine-side connector interface, or each of the plurality of inlet flow paths having a dedicated pump configured to meter dialysis fluid from the at least one powder compartment and the at least one liquid compartment. Ritson discloses an apparatus the inlet flow path being a singular inlet flow path being fluidly coupled to the outlet flow path being a singular outlet channel configured to allow for delivery of purified water when the valve is opened by the valve opening member, when the valve is opened by the valve opening member, in which the valve opening member engages with the vale to open the valve when the container-side connector interface is mated to the machine-side connector interface, (Single outlet and inlet into Concentrate Disposable, See Figure 7, See paragraphs [0007], [0008]; See paragraph [0044], Ritson). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to have modified the container of Jansson by incorporating the inlet flow path being a singular inlet flow path being fluidly coupled to the outlet flow path being a singular outlet channel configured to allow for delivery of purified water when the valve is opened by the valve opening member when the valve is opened by the valve opening member, in which the valve opening member engages with the vale to open the valve when the container-side connector interface is mated to the machine-side connector interface as in Ritson in order to provide “minimal connection points” that “can be easily installed for automated mixing and movement of fluids”, (See paragraph [0027], Ritson), that will “automate and improve the performance, efficiency and safety of dialysis therapy”, (See paragraph [0025], Ritson). Modified Jansson does not disclose a sensor configured to detect an electrolyte level in the patient’s blood, and a processor configured to adjust a supply ratio of the powdered dialysate component and the liquid dialysate component during dialysis therapy based on the detected electrolyte level, or each of the plurality of inlet flow paths having a dedicated pump configured to meter dialysis fluid from the at least one powder compartment and the at least one liquid compartment. Gerber discloses a sensor configured to detect an electrolyte level in the patient’s blood, and a processor configured to adjust a supply ratio of the powdered dialysate component and the liquid dialysate component during dialysis therapy based on the detected electrolyte level, (See paragraph [0050], [0008] & [0009], [0043], Gerber). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to have modified the method of modified Jansson by incorporating a sensor configured to detect an electrolyte level in the patient’s blood, and a processor configured to adjust a supply ratio of the powdered dialysate component and the liquid dialysate component during dialysis therapy based on the detected electrolyte level as in Gerber because “by monitoring pH or electrolytes, a more appropriate initial dialysate or replacement fluid may be used, or the fluid may be adjusted during a session, to enhance patient safety”, (See paragraph [0006], Gerber). Modified Jansson does not disclose each of the plurality of inlet flow paths having a dedicated pump configured to meter dialysis fluid from the at least one powder compartment and the at least one liquid compartment. Orhan discloses each of the plurality of inlet flow paths having a dedicated pump configured to meter dialysis fluid from the at least one powder compartment and the at least one liquid compartment, (Pumps 71-73 for each of Infusate sources 36-38, See Figure 1, See paragraph [0256], Orhan). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to have modified the method of modified Jansson by incorporating each of the plurality of inlet flow paths having a dedicated pump configured to meter dialysis fluid from the at least one powder compartment and the at least one liquid compartment as in Orhan so that “the concentrate solutions are added at a rate that depends on the concentration of the infusate concentrates and the rate of flow of fluid” and “the rate of addition of [an infusate]…is adjusted to maintain a constant concentration gradient or rate of mass transfer…during treatment”, (See paragraph [0256], Orhan). Additional Disclosures Included: Claim 11: The disposable container of claim 10, wherein the at least one powder compartment comprises a NaCl powder compartment and a NaHCO3 powder compartment, (Sodium Chloride Compartment 414, Sodium Bicarbonate Compartment 412, See Figure 10, See page 65, lines 7-10,11, See page 67, lines 11-16, Jansson). Claim 13: The disposable container of claim 10, further comprising a diffuser or filter disposed in the outlet flow paths downstream of the at least one powder compartment, (Filter Element 438 from Compartment 420 to Lines 407a/b & Channel 436, See Figures 5, 22 & 23, See page 68, lines 28-37, Jansson). Claim 16: The disposable container of claim 10, wherein the singular outlet channel of the machine-side connector interface is fluidly coupled to a source of purified water, (At least Channels 430 fluidly connected to Line 4a, See Figure 5, See page 67, lines 4-10, page 77, lines 34-38, page 78, lines 1-6, See page 39, lines 6-31, See page 74, lines 4-12, lines 22-25, lines 35-38, page 75, line 1, Jansson). Claim 20: The disposable container of claim 10, wherein each of the plurality of outlet flow paths comprises a flow sensor configured to measure a flow rate of dialysis fluid from the at least one powder compartment and the at least one liquid compartment to the dialysis machine, (Tachometers 454/456 on Pumps 446/452, See Figure 5, See page 75, lines 2-15, Jansson). Claim 21: The disposable container of claim 10, wherein the at least one powder compartment and the at least one liquid compartment are large enough to generate enough dialysis fluid to support multiple dialysis treatments, (See page 34, lines 22-37, See page 35, lines 18-30, See page 113, lines 30-37; Examiner interprets multiple fill/drain cycles while treating a patient to read upon multiple treatments within one session; also See page 63, lines 18-25). Claim 12 is/are rejected under 35 U.S.C. 103 as being unpatentable over Jansson et al., (“Jansson”, WO00/57935A1), in view of Ritson et al., (“Ritson”, WO 2018/035520), in further view of Gerber et al., (“Gerber”, US 2012/0277552), in further view of Orhan et al., (“Orhan”, US 2012/0273354), in further view of Kalaskar et al., (“Kalaskar”, US 2020/0282125). Claim 12 is directed to a disposable container configured to facilitate real-time dialysis fluid production, a device or apparatus type invention group. Regarding Claim 12, modified Jansson discloses the disposable container of claim 10, wherein the at least one liquid compartment comprises a C6H8O7 compartment, a C6H12O6 compartment, and a MgCl2 compartment, (Glucose Compartment 420, Magnesium Chloride Compartment 418, See Figure 10, Cleaning Agent Compartment 410 can contain Citric Acid, See Figure 10, See page 65, lines 9-14, See page 66, lines 13-16, See page 108, lines 27-29, Jansson). Modified Jansson does not explicitly disclose that each of these compartments are in liquid form. Jansson suggests providing at least one of its compartments in liquid form, (See page 8, lines 28-31, page 23, lines 14-20). Kalaskar discloses a container, (Dispenser 202, See Figure 2, See paragraph [0050]), where its compartments are in liquid form, (See paragraphs [0044] & [0050]; Kalaskar presents its concentrates to be alternate forms between liquid and solid, thus Examiner interprets they can be selected as liquid). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to have modified the method of providing dialysis therapy of modified Jansson by incorporating each of the compartments are in liquid form as in Kalaskar so that “based on the prescription, the dialysate mixing system can determine, a…volume of concentrated…solution required for each chemical constituent” so that it “can be automatically dispensed and mixed with purified water…according to the desired dialysate recipe” while being “delivered and stored in…concentrated form, thus requiring minimal storage space and oversight”, (See paragraph [0034], Kalaskar). Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). 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 JONATHAN M PEO whose telephone number is (571)272-9891. The examiner can normally be reached M-F, 9AM-5PM. 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, Bobby Ramdhanie can be reached on 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. /JONATHAN M PEO/Primary Examiner, Art Unit 1779
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Prosecution Timeline

Show 7 earlier events
Apr 08, 2025
Response Filed
Apr 16, 2025
Final Rejection mailed — §103
Oct 16, 2025
Notice of Allowance
Dec 16, 2025
Request for Continued Examination
Dec 18, 2025
Response after Non-Final Action
Dec 23, 2025
Non-Final Rejection mailed — §103
Jun 16, 2026
Response Filed
Sep 01, 2026
Final Rejection mailed — §103 (current)

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Prosecution Projections

7-8
Expected OA Rounds
48%
Grant Probability
96%
With Interview (+48.1%)
3y 9m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 456 resolved cases by this examiner. Grant probability derived from career allowance rate.

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