US2767818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device
Assignee: Northrop Grumman Corp
•
Filing: 1953-12-04
•
Granted: 1956-10-23
•
Expires: 1973-12-04
Abstract
No abstract record available.
Inventors
- 👤 Max C Huling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:16
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/28; B30B15/285; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2144; Y10T74/2148; Y10T74/2149
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE524680C
Cited
US1121886A
Cited
US1222695A
Cited
US1349033A
Cited
US2058668A
Cited
US2494847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |