US2669929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device
Assignee: Individual
•
Filing: 1947-03-13
•
Granted: 1954-02-23
•
Expires: 1967-03-13
Abstract
No abstract record available.
Inventors
- 👤 George O Shull
- 👤 Richard B Murrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:55
CPC Classifications
F; F42; F42C; F42C15/00; F42C15/20; F42B; F42B1/00; F42B1/04; F42C15/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1316491A
Cited
US1835666A
Cited
US1898073A
Cited
US1724294A
Cited
US2287251A
Cited
GB537577A
Cited
US2314678A
Cited
US2398266A
Cited
US2438438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |