US3052485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact gate
Assignee: GEORGE M CLARKSON
•
Filing: 1959-09-21
•
Granted: 1962-09-04
•
Expires: 1979-09-21
Abstract
No abstract record available.
Inventors
- 👤 Keener John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:34
CPC Classifications
B; B60; B60P; B60P7/00; B60P7/06; B60P7/135; B60P7/15
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US367367A
Cited
US1064130A
Cited
US1931391A
Cited
US2543175A
Cited
US2608420A
Cited
US2712797A
Cited
US2961271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |