Patent US2515291A successfully refreshed from Google Patents.
US2515291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trip mechanism
Assignee: Individual
•
Filing: 1947-08-11
•
Granted: 1950-07-18
•
Expires: 1967-08-11
Abstract
No abstract record available.
Inventors
- 👤 Brown Norman Fraser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:50
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/56; Y; Y10; Y10T; Y10T74/00; Y10T74/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US224254A
Cited
US339043A
Cited
US956595A
Cited
US1030532A
Cited
US1271964A
Cited
US1532212A
Cited
US1782664A
Cited
US1974844A
Cited
US2454189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |