Prosecution Insights
Last updated: October 02, 2026
Application No. 18/968,607

PRESSURE CHANGING UNIT AND LIQUID EJECTION DEVICE

Non-Final OA §102
Filed
Dec 04, 2024
Priority
Dec 07, 2023 — JP 2023-207054 +1 more
Examiner
KNIEF, THOMAS RAY
Art Unit
Tech Center
Assignee
Seiko Epson Corporation
OA Round
1 (Non-Final)
91%
Grant Probability
Favorable
1-2
OA Rounds
5m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 91% — above average
91%
Career Allowance Rate
48 granted / 53 resolved
+30.6% vs TC avg
Moderate +10% lift
Without
With
+10.4%
Interview Lift
resolved cases with interview
Typical timeline
2y 3m
Avg Prosecution
15 currently pending
Career history
62
Total Applications
across all art units

Statute-Specific Performance

§101
1.9%
-38.1% vs TC avg
§103
44.2%
+4.2% vs TC avg
§102
33.5%
-6.5% vs TC avg
§112
20.4%
-19.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 53 resolved cases

Office Action

§102
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 . Priority Receipt is acknowledged of certified copies of papers required by 37 CFR 1.55. Information Disclosure Statement The information disclosure statement (IDS) submitted on December 4, 2024 was filed in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement is being considered by the examiner. Drawings The drawings are objected to as failing to comply with 37 CFR 1.84(p)(5) because they do not include the following reference sign(s) mentioned in the description: pressurized air port H99 recited in ¶[0091] of the Specification. Corrected drawing sheets in compliance with 37 CFR 1.121(d) are required in reply to the Office action to avoid abandonment of the application. Any amended replacement drawing sheet should include all of the figures appearing on the immediate prior version of the sheet, even if only one figure is being amended. Each drawing sheet submitted after the filing date of an application must be labeled in the top margin as either “Replacement Sheet” or “New Sheet” pursuant to 37 CFR 1.121(d). If the changes are not accepted by the examiner, the applicant will be notified and informed of any required corrective action in the next Office action. The objection to the drawings will not be held in abeyance. Specification The lengthy specification has not been checked to the extent necessary to determine the presence of all possible minor errors. Applicant’s cooperation is requested in correcting any errors of which applicant may become aware in the specification. 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 1-4 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Yoshida (US 20080143779 A1). Regarding claim 1, Yoshida teaches a pressure changing unit for changing pressures at a plurality of connect destinations, the pressure changing unit comprising: a motor (fig. 8; drive motor 25A; ¶[0078]-[0080]); a pump that is connected to the motor and that is driven by power of the motor (fig. 8; pump 25; ¶0078]-[0080]); a switching section configured to switch connection between the plurality of connect destinations and the pump by the power of the motor (fig. 8; switching valve apparatus 37; ¶[0045], [0079]); and a transmission section positioned between the motor and the switching section, wherein the transmission section is configured to, when the motor rotates in a forward direction, not transmit power from the motor to the switching section and, when the motor rotates in a reverse direction, transmit power from the motor to the switching section (fig. 8; one-way clutch mechanism 96; ¶[0078]-[0080]). Regarding claim 2, Yoshida teaches the pressure changing unit according to claim 1, wherein the switching section includes a plurality of valves positioned between the plurality of connect destinations and the pump and a plurality of cams configured to open and close each of the plurality of valves (figs. 8, 11-12; valve bodies 38, cam shaft 55, cam members 56-59; ¶[0101]). Regarding claim 3, Yoshida teaches the pressure changing unit according to claim 1, wherein the switching section includes a switching body that is positioned between the plurality of connect destinations and the pump and that is configured to, by rotating, switch the connection between the plurality of connect destinations and the pump (figs. 8, 11-12; cam shaft 55, cam members 56-59; ¶[0101]). Regarding claim 4, Yoshida teaches the pressure changing unit according to claim 1, wherein the transmission section includes a one way clutch (fig. 8; one-way clutch mechanism 96; ¶[0078]-[0080]). Allowable Subject Matter Claims 5-6 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. The following is a statement of reasons for the indication of allowable subject matter: Regarding claim 5, the prior art of record fails to teach or fairly suggest the pressure changing unit of the claim, particularly including and in combination with, a second motor, a second pump that is connected to the second motor and that is driven by the power of the second motor, an air release section that is connected to the plurality of connect destinations and that is configured to open the plurality of connect destinations to atmosphere, and a second transmission section that is positioned between the second motor and the air release section and that is configured to transmit the power of the second motor to the air release section, the second pump is configured to change the pressure of at least one of the connect destinations among the plurality of connect destinations, and the air release section is configured to close, when the second motor rotates in the forward direction and to open when the second motor rotates in the reverse direction. Regarding claim 6, the prior art of record fails to teach or fairly suggest the pressure changing unit of the claim, particularly including and in combination with, a detection section configured to detect rotation angle of the motor and a control section configured to control the motor, wherein the control section when causing the motor to rotate in the forward direction, open controls the motor and when causing the motor to rotate in the reverse direction, PID controls the motor based on a detection result by the detection section. Claims 7-11 are hereby allowed. The following is an examiner’s statement of reasons for allowance: Regarding independent claim 7, the prior art of record fails to teach or fairly suggest the liquid ejection device of the claim, particularly including and in combination with, the pressure changing unit according to claim 1, at least either the liquid supply unit or the liquid ejection unit includes an accommodation section configured to accommodate liquid, the accommodation section includes a membrane member configured to divide the inside of the accommodation section into an air chamber and a liquid chamber, the plurality of connect destinations includes the accommodation section, and the pressure changing unit is configured to change pressure in the air chamber. The closest art of record, Wan et al. (US 20170246880 A1) teaches an air priming system that primes printer fluid in one or more fluid tanks, but fails to teach a transmission section configured to, when the motor rotates in a forward direction, not transmit power from the motor to the switching section and, when the motor rotates in a reverse direction, transmit power from the motor to the switching section. Any comments considered necessary by applicant must be submitted no later than the payment of the issue fee and, to avoid processing delays, should preferably accompany the issue fee. Such submissions should be clearly labeled “Comments on Statement of Reasons for Allowance.” Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Yokouchi (US 20130093820 A1) teaches an ink supply system comprising a motor configured to drive a pump, and a clutch and transmission system configured to transmit power from the motor to the pump. Yokouchi (US 20100020139 A1) teaches a diaphragm pump which supplies a liquid from a tank to a printhead. Ito (US 20070081056 A1) teaches a valve device comprising a clutch and cam mechanism. Any inquiry concerning this communication or earlier communications from the examiner should be directed to THOMAS RAY KNIEF whose telephone number is (703)756-5733. The examiner can normally be reached M-F, 8AM - 5 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, Stephen Meier can be reached at 5712722149. 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. /TRK/Examiner, Art Unit 2853 /STEPHEN D MEIER/Supervisory Patent Examiner, Art Unit 2853
Read full office action

Prosecution Timeline

Dec 04, 2024
Application Filed
Aug 12, 2026
Non-Final Rejection mailed — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12734842
DIGITAL FLOCKING PROCESS
1y 5m to grant Granted Sep 15, 2026
Patent 12728654
PRINTER HAVING ARRAY OF OVERLAPPING PRINTHEADS
2y 0m to grant Granted Sep 08, 2026
Patent 12709105
PRINTING APPARATUS AND PRINTING METHOD
3y 1m to grant Granted Aug 18, 2026
Patent 12697828
PRINTER
1y 9m to grant Granted Aug 04, 2026
Patent 12691700
PRINTING APPARATUS AND METHOD FOR PRODUCING PRINTED MATTER
2y 5m to grant Granted Jul 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
91%
Grant Probability
99%
With Interview (+10.4%)
2y 3m (~5m remaining)
Median Time to Grant
Low
PTA Risk
Based on 53 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