US2628561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propellant powder grain for rocket motors
Assignee: Individual
•
Filing: 1943-03-17
•
Granted: 1953-02-17
•
Expires: 1963-03-17
Abstract
No abstract record available.
Inventors
- 👤 Bruce H Sage
- 👤 William N Lacey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:30
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US175735A
Cited
US273209A
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US440921A
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US726901A
Cited
US677528A
Cited
US778788A
Cited
US1397915A
Cited
US2267261A
Cited
US2408252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |