US2923204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propellant chamber means
Assignee: Individual
•
Filing: 1954-10-08
•
Granted: 1960-02-02
•
Expires: 1974-10-08
Abstract
No abstract record available.
Inventors
- 👤 Henry H Mohaupt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:07
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/116; E21B43/25; E21B43/26; E21B43/263
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US120963A
Cited
US671708A
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US868876A
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US2044345A
Cited
GB484346A
Cited
GB592092A
Cited
US2568078A
Cited
US2568080A
Cited
US2775200A
Cited
US2696259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |