Prosecution Insights
Last updated: May 29, 2026
Application No. 18/578,469

CONTAINMENT SYSTEM FOR LIQUID HYDROGEN

Non-Final OA §112
Filed
Jan 11, 2024
Priority
Aug 02, 2021 — EU 21189175.9 +1 more
Examiner
VOLZ, ELIZABETH J
Art Unit
3733
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Shell Usa Inc.
OA Round
1 (Non-Final)
67%
Grant Probability
Favorable
1-2
OA Rounds
4m
Est. Remaining
85%
With Interview

Examiner Intelligence

Grants 67% — above average
67%
Career Allowance Rate
725 granted / 1088 resolved
-3.4% vs TC avg
Strong +19% interview lift
Without
With
+18.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 9m
Avg Prosecution
38 currently pending
Career history
1144
Total Applications
across all art units

Statute-Specific Performance

§101
0.4%
-39.6% vs TC avg
§103
66.5%
+26.5% vs TC avg
§102
18.4%
-21.6% vs TC avg
§112
9.0%
-31.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1088 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 . Election/Restrictions Claims 7 and 8 are withdrawn from further consideration pursuant to 37 CFR 1.142(b), as being drawn to a nonelected method, there being no allowable generic or linking claim. Applicant timely traversed the restriction (election) requirement in the reply filed on 9/19/25. The amendments to the claims along with the arguments are considered persuasive and therefore, claims 7 and 8 have been rejoined. Claims 1-9 are currently pending in the application. 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. Claim 8 is 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. Regarding Claim 8, it is unclear if the “method” of line 1 is the method of manufacturing a containment system of claim 7. Regarding Claim 8, it is unclear what “those parts” of line 1 is referring to. Regarding Claim 8, it is unclear whether the inner barrier is made of ice (references the inner barrier layer made of ice in line 2) since it was not mentioned in claim 1 or 7. Allowable Subject Matter Claims 1-7 and 9 are allowed. The following is a statement of reasons for the indication of allowable subject matter: The combination of the containment space containing liquid hydrogen along with the outer barrier layer made of cryogenic ice with a vacuum layer between the inner and outer barrier layer is considered allowable subject matter. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to ELIZABETH J VOLZ whose telephone number is (571)270-5430. The examiner can normally be reached Monday-Friday 11am-7pm 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, NATHAN JENNESS can be reached at (571)270-5055. 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. /ELIZABETH J VOLZ/Examiner, Art Unit 3733
Read full office action

Prosecution Timeline

Jan 11, 2024
Application Filed
Feb 03, 2026
Non-Final Rejection mailed — §112
Apr 09, 2026
Response Filed

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12630358
WASTE CONTAINERS WITH UNIVERSAL BAG RECEPTACLE
1y 9m to grant Granted May 19, 2026
Patent 12612248
REFUSE CONTAINER FOR BLOCKING ODOR OF DISPOSED MATERIALS
1y 9m to grant Granted Apr 28, 2026
Patent 12605923
PACKAGING MATERIAL HAVING EXPANDABLE LAYERS
2y 4m to grant Granted Apr 21, 2026
Patent 12600528
PACKAGE AND CLOSURE FOR PACKAGE
1y 9m to grant Granted Apr 14, 2026
Patent 12595885
NONUNIFORM WALL THICKNESS PROFILE FOR TEARDROP PRESSURE VESSELS
2y 9m to grant Granted Apr 07, 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
67%
Grant Probability
85%
With Interview (+18.8%)
2y 9m (~4m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1088 resolved cases by this examiner. Grant probability derived from career allowance rate.

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