Prosecution Insights
Last updated: April 19, 2026
Application No. 19/039,991

DEVELOPING DEVICE

Non-Final OA §102§103
Filed
Jan 29, 2025
Examiner
TRAN, HOAN H
Art Unit
2852
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Canon Kabushiki Kaisha
OA Round
1 (Non-Final)
96%
Grant Probability
Favorable
1-2
OA Rounds
1y 8m
To Grant
99%
With Interview

Examiner Intelligence

Grants 96% — above average
96%
Career Allow Rate
524 granted / 546 resolved
+28.0% vs TC avg
Minimal +4% lift
Without
With
+4.2%
Interview Lift
resolved cases with interview
Fast prosecutor
1y 8m
Avg Prosecution
7 currently pending
Career history
553
Total Applications
across all art units

Statute-Specific Performance

§101
3.9%
-36.1% vs TC avg
§103
21.1%
-18.9% vs TC avg
§102
43.2%
+3.2% vs TC avg
§112
12.2%
-27.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 546 resolved cases

Office Action

§102 §103
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 statements (IDS) submitted on 01/29/2025 and 06/02/20255 have been considered. 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. Claims1, 8 and 9 are rejected under 35 U.S.C. 103 as being obvious over Hirobe et al. [EP 1 357 443 A2] in view of Furukawa [8,909,108]. The applied reference has a common Assignee with the instant application. Based upon the earlier effectively filed date of the reference, it constitutes prior art under 35 U.S.C. 102(a)(2). This rejection under 35 U.S.C. 103 might be overcome by: (1) a showing under 37 CFR 1.130(a) that the subject matter disclosed in the reference was obtained directly or indirectly from the inventor or a joint inventor of this application and is thus not prior art in accordance with 35 U.S.C.102(b)(2)(A); (2) a showing under 37 CFR 1.130(b) of a prior public disclosure under 35 U.S.C. 102(b)(2)(B); or (3) a statement pursuant to 35 U.S.C. 102(b)(2)(C) establishing that, not later than the effective filing date of the claimed invention, the subject matter disclosed and the claimed invention were either owned by the same person or subject to an obligation of assignment to the same person or subject to a joint research agreement. See generally MPEP § 717.02. Regarding claim 1, Hirobe et al. disclose an image forming apparatus [Fig. 2] comprising a plurality of rotatable image bearing member [10], and a developing device [1] having a developing container [2] configured to contain a developer including toner and a carrier [Para. 0043], a first rotatable developing member [8] to which the developer contained in the developing container is supplied and which carried and feeds the developer to a first developing position where an electrostatic latent image formed on the rotatable image bearing member is developed [Fig. 1], a second rotatable developing member [11] provided opposed to the first rotatable developing member, a second developing position where the electrostatic latent image passed through the first developing position is developed [Fig. 1], a first magnet provided non-rotatably and stationarily inside the first rotatable developing member [Para. 0036], and a second magnet provided non-rotatably and stationarily inside the second rotatable developing member [Para. 0036]; wherein a rotational axis of the second rotatable developing member is positioned above a rotational axis of the first rotatable developing member [Fig. 1], and the developer is delivered from the first rotatable developing member to the second rotatable developing member against a gravitational direction by a magnetic field generated between the first magnet and the second magnet [Fig. 1]. However, Hirobe et al. do not disclose outer peripheral surfaces of the first and second rotatable developing members including a plurality of grooves. Furukawa discloses a developing device [Fig. 1] comprising a first rotatable developing member having an outer peripheral surface provided with a plurality of grooves, and a second rotatable developing member having an outer peripheral surface provided with a plurality of grooves [Col. 2, lines 51-59]. It would have been obvious to one of ordinary skill in the art at the time of the invention was made to have the outer peripheral surfaces of the first and second rotatable developing members disclosed by Hirobe et al. having a plurality of grooves as taught by Furukawa for the purpose of effectively conveying the developer to the developing positions. Regarding claim 8, Hirobe et al. disclose the first rotatable developing member and the second rotatable developing member are rotated in directions opposite to each other in a position where the first rotatable developing member and the second rotatable developing member oppose each other [Fig. 1]. Regarding claim 9, Hirobe et al. disclose the first rotatable developing member and the image bearing member member are rotated in the same direction in a position where the first rotatable developing member and the image bearing member oppose each other [Fig. 1], and the second rotatable developing member and the image bearing member are rotated in the same direction in a position where the second rotatable developing member and the image bearing member oppose each other [Fig. 1]. Allowable Subject Matter Claims 2-7 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. Contact Information Any inquiry concerning this communication or earlier communications from the examiner should be directed to HOAN H TRAN whose telephone number is (571)272-2141. The examiner can normally be reached on M-F 9AM-5:30PM. 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, Walter Lindsay can be reached on 571-272-1674. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIRsystem, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /HOAN H TRAN/Primary Examiner, Art Unit 2852 01/06/26
Read full office action

Prosecution Timeline

Jan 29, 2025
Application Filed
Mar 21, 2026
Non-Final Rejection — §102, §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12601988
IMAGE FORMING APPARATUS
2y 5m to grant Granted Apr 14, 2026
Patent 12601990
DEVELOPING CARTRIDGE
2y 5m to grant Granted Apr 14, 2026
Patent 12596316
DEVELOPING CARTRIDGE
2y 5m to grant Granted Apr 07, 2026
Patent 12591201
ADAPTER, CARTRIDGE, AND IMAGE FORMING APPARATUS
2y 5m to grant Granted Mar 31, 2026
Patent 12591187
IMAGE FORMING APPARATUS
2y 5m to grant Granted Mar 31, 2026
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
96%
Grant Probability
99%
With Interview (+4.2%)
1y 8m
Median Time to Grant
Low
PTA Risk
Based on 546 resolved cases by this examiner. Grant probability derived from career allow rate.

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