Prosecution Insights
Last updated: July 17, 2026
Application No. 18/453,222

MAGNETOHYDRODYNAMIC DEVICE AND METHOD FOR GAS PRODUCTION IN MICROGRAVITY

Non-Final OA §112
Filed
Aug 21, 2023
Priority
Aug 22, 2022 — provisional 63/399,784
Examiner
HASKE, WOJCIECH
Art Unit
Tech Center
Assignee
GEORGIA TECH RESEARCH Corporation
OA Round
1 (Non-Final)
73%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
91%
With Interview

Examiner Intelligence

Grants 73% — above average
73%
Career Allowance Rate
427 granted / 585 resolved
+13.0% vs TC avg
Strong +18% interview lift
Without
With
+17.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
33 currently pending
Career history
623
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
76.5%
+36.5% vs TC avg
§102
10.8%
-29.2% vs TC avg
§112
4.7%
-35.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 585 resolved cases

Office Action

§112
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 Objections Claim 12 is objected to because of the following informalities: in line 3, “to” is messing between “electrodes electrolyze”. 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 1-20 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. The independent claims 1 and 18 recite are indefinite because it is not clear how to interpret direction of electromagnetic filed, because electromagnetic filed is a tensor representing two perpendicular vectors not a single vector. Therefore, it is not clear what direction would meet this limitation. For the purpose of further examination, the limitation will be interpreted as the direction of magnetic field component of the electromagnetic filed. The independent claims 1 and 18 recite “wherein a current is applied between the first and second electrodes (a), and in the static magnetic or electromagnetic field, to generate a Lorentz force in a direction perpendicular to both”, which makes the claims indefinite because it is not clear what “(a)” is referencing. Furthermore, it is clear that the applied current generates Lorentz force, however the part reciting “(a), and in the … field, to generate…“ is confusing and not clear how to interpret it. For the purpose of further examination, the wherein clause will be interpreted as wherein a) a current is applied between the first and second electrodes to generate Lorentz force in the direction to both the applied current and the magnetic field. Claims 2-17, 19 and 20 depend on claims 1 and 18 therefore are also indefinite. Allowable Subject Matter Claims 1-20 would be allowable if rewritten or amended to overcome the rejection(s) under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), 2nd paragraph, set forth in this Office action. The following is a statement of reasons for the indication of allowable subject matter: novel and inventive over prior art of record. The closest prior art (Lin et al. “The effect of magnetic force on hydrogen production efficiency in water electrolysis“ International journal of hydrogen energy 37 ‘2012’ 1311-1320) discloses a magnetohydrodynamic device configured for gas production and phase separation, the device comprising: a housing having a first side, a second side, and a sidewall defining an inner volume (Fig. 2); one or more permanent magnets or electromagnetic source modules arranged adjacent to the sidewall and configured to generate static magnetic field towards the inner volume (Fig. 2); at least two electrodes, including a first electrode and a second electrode, disposed within the inner volume and spaced apart from each other in an axial direction (Fig. 2); an outlet/ inlet defined in the housing at the first side and configured to expel a gas, generated from the liquid, from the inner volume (Fig. 2); wherein (a) a current is applied between the first and second electrodes to generate a Lorentz force in a direction perpendicular to both (i) the applied current and (ii) the static magnetic, the Lorentz force exerting a circumferential acceleration on the liquid to form a vortical flow within the inner volume and (b) the first and second electrodes electrolyze the liquid to form the gas while the vortical flow urges the gas toward the outlet through the generation of centripetal acceleration (abstract and Fig. 2). However, the independent claims 1 and 18 require the magnetohydrodynamic device to produce the magnetic field directed radially. The magnets Lin will only produce magnetic field in parallel lines between the two magnets. Radial direction requires a curved magnet such as arrange in a circle. Similarly, Li, YH., Chen, YJ. “The effect of magnetic field on the dynamics of gas bubbles in water electrolysis.” Sci Rep 11, 9346 (2021) discloses a magnetohydrodynamic device with two parallel magnets and two parallel electrodes, where upon applied electric current gas bubbles are generated and driven by Lorentz force, in circular or cylindrical magnetic field (page 4, last paragraph), not radially as claimed. Lin (US 5668420 A) discloses a magnetohydrodynamic device with cylindrical electrodes and solenoid surrounding the cylindrical electrodes thus forming a magnetic field directed along the axis of the cylinder. The prior art or record does not disclose nor suggest the claimed invention as claimed. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to Wojciech Haske whose telephone number is (571)272-5666. The examiner can normally be reached M-F: 9:30 am - 6:00 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, James Lin can be reached at 571-272-8902. 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. /WOJCIECH HASKE/ Examiner, Art Unit 1794
Read full office action

Prosecution Timeline

Aug 21, 2023
Application Filed
Jul 01, 2026
Non-Final Rejection mailed — §112 (current)

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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
73%
Grant Probability
91%
With Interview (+17.8%)
2y 5m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 585 resolved cases by this examiner. Grant probability derived from career allowance rate.

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