Prosecution Insights
Last updated: April 19, 2026
Application No. 18/848,827

ACCELERATOR AND PARTICLE THERAPY APPARATUS

Non-Final OA §112
Filed
Sep 19, 2024
Examiner
PHAM, THAI N
Art Unit
2844
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Hitachi High-Tech Corporation
OA Round
1 (Non-Final)
77%
Grant Probability
Favorable
1-2
OA Rounds
2y 2m
To Grant
98%
With Interview

Examiner Intelligence

Grants 77% — above average
77%
Career Allow Rate
700 granted / 905 resolved
+9.3% vs TC avg
Strong +21% interview lift
Without
With
+21.0%
Interview Lift
resolved cases with interview
Fast prosecutor
2y 2m
Avg Prosecution
29 currently pending
Career history
934
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
47.1%
+7.1% vs TC avg
§102
21.6%
-18.4% vs TC avg
§112
20.9%
-19.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 905 resolved cases

Office Action

§112
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 . DETAILED ACTION Receipt of preliminary amendment filed on 09/19/2024 is acknowledged. Claim 9 has been amended. Thus, claims 1-9 are pending in the instant application. Priority Receipt is acknowledged of certified copies of papers submitted under 35 U.S.C. 119(a)-(d), which papers have been placed of record in the file. Information Disclosure Statement The information disclosure statements (IDSs) submitted on 09/19/2024 is in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statements have been considered by the examiner. Claim Objections Claim 1 is objected to because of the following informalities: In claim 1, line 1, it is suggested that the limitation recites “A circular accelerator that applies a static magnetic field that circulates a charged particle beam,” should be changed to --A circular accelerator that applies a static magnetic field that circulates a charged particle beam, comprising: -- to make it clearer. Appropriate correction is required. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 1-9 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Claim 1 is rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being incomplete for omitting essential structural cooperative relationships of elements, such omission amounting to a gap between the necessary structural connections. See MPEP § 2172.01. The omitted structural cooperative relationships are: “after a radio frequency acceleration voltage stop, the radio frequency acceleration voltage control device obtains the circulation frequency of the charged particle beam circulating inside the circular accelerator or kinetic energy of the charged particle beam, and the radio frequency extraction voltage control device generates the radio frequency disturbance electric field according to the obtained circulation frequency or kinetic energy.” In addition, a claim which fails to interrelate essential elements of the invention as defined by applicant(s) in the specification may be rejected under 35 U.S.C. 112(b) or pre-AIA 35 U.S.C. 112, second paragraph, for failure to point out and distinctly claim the invention. See In re Venezia, 530 F.2d 956, 189 USPQ 149 (CCPA 1976); In re Collier, 397 F.2d 1003, 158 USPQ 266 (CCPA 1968). But see Ex parte Nolden, 149 USPQ 378, 380 (Bd. Pat. App. & Inter. 1965) ("[I]t is not essential to a patentable combination that there be interdependency between the elements of the claimed device or that all the elements operate concurrently toward the desired result"); Ex parte Huber, 148 USPQ 447, 448-49 (Bd. Pat. App. & Inter. 1965) (A claim does not necessarily fail to comply with 35 U.S.C. 112, second paragraph where the various elements do not unction simultaneously, are not directly functionally related, do not directly incorporate, and/or serve independent purposes.) Regarding claim 1, the limitation recites “the radio frequency disturbance electric field is generated according to the obtained circulation frequency or kinetic energy” is unclear and leaves the reader in doubt as to the meaning of the technical feature to which it refers. It is unclear that how does the radio frequency disturbance electric field is generated? Maybe, a radio frequency extraction voltage control device generates the radio frequency disturbance electric field according to the obtained circulation frequency or kinetic energy. And how does a circulation frequency of the charged particle beam circulating inside the circular accelerator or kinetic energy of the charged particle beam is obtained after stopping the radio frequency acceleration electric field? Maybe, a radio frequency acceleration voltage control device obtains the circulation frequency of the charged particle beam circulating inside the circular accelerator or kinetic energy of the charged particle beam after a radio frequency acceleration voltage stop. The claims fail to recite sufficiently definite structure, material or acts for achieving the functional result recited in the claim to reasonably apprise one of ordinary skill in the art of the scope of the claims. Claims 2-9 are depending on claim 1, and are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph as the same reason as stated above. Allowable Subject Matter Claims 1-9 are allowable if the objections and 112 issues above are fixed. Citation of Relevance Prior Arts The prior art made of record and not relied upon is considered pertinent to applicant's disclosure: Aoki et al. (U.S Publication No. 20200330793 A1) discloses an accelerator includes: a plurality of ion sources that generate a plurality of different types of ions; an electromagnet that generates a magnetic field; and a high frequency cavity that generates a high frequency electric field. The center of an orbit of the ion is eccentric with acceleration, the magnetic field generated by the electromagnet is a magnetic field distribution that decreases outward in a radial direction of the orbit, the high frequency cavity accelerates the ion up to a predetermined energy by the high frequency electric field adjusted to an orbital frequency in response to a nuclide of the incident ion, and a frequency of the high frequency electric field changes following an energy of the ion. Hae et al. (U.S Publication No. 20210195725 A1) discloses a circular accelerator that applies a radiofrequency wave in a main magnetic field to accelerate charged particle beam while increasing an orbit radius, another radiofrequency wave with a frequency different from the radiofrequency wave used for acceleration is applied to the charged particle beam in order to extract the charged particle beam. Thereby, in the circular accelerator that accelerates charged particle beam while increasing an orbit radius by applying a radiofrequency wave in a main magnetic field, the high precision control on extraction of the charged particle beam from the circular accelerator is achieved. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to THAI N PHAM whose telephone number is (571)270-5518. The examiner can normally be reached M-F 9:00 am-5:00 pm. 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, Regis Betsch can be reached at (571) 270-7101. 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. /Thai Pham/Primary Examiner, Art Unit 2844 01/09/2026
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Prosecution Timeline

Sep 19, 2024
Application Filed
Jan 09, 2026
Non-Final Rejection — §112 (current)

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Prosecution Projections

1-2
Expected OA Rounds
77%
Grant Probability
98%
With Interview (+21.0%)
2y 2m
Median Time to Grant
Low
PTA Risk
Based on 905 resolved cases by this examiner. Grant probability derived from career allow rate.

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