US2621678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive coupling
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1945-12-21
•
Granted: 1952-12-16
•
Expires: 1965-12-21
Abstract
No abstract record available.
Inventors
- 👤 Snyder Jacob Rush
- 👤 Jr Frederick Atwood Pease
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:56
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/02; F16D3/10; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1542; Y10T74/1547; Y10T74/1552
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US577490A
Cited
US1193008A
Cited
US284475A
Cited
US801012A
Cited
US937127A
Cited
US980502A
Cited
AT83384B
Cited
US1405001A
Cited
US1502915A
Cited
US1409103A
Cited
US1462879A
Cited
GB334778A
Cited
CH154063A
Cited
US1953182A
Cited
GB411370A
Cited
US2203233A
Cited
US2390882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |