US2661692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical gas flow channel for solid propellants
Assignee: Individual
•
Filing: 1952-05-07
•
Granted: 1953-12-08
•
Expires: 1972-05-07
Abstract
No abstract record available.
Inventors
- 👤 Conard R Vegren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:17
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/30; F02K9/10; F02K9/18; F42; F42B; F42B10/00; F42B10/02; F42B10/26; F42B10/28; F42B10/30; F05; F05D; F05D2250/00; F05D2250/20; F05D2250/25
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US40041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |