Patent US2792080A successfully refreshed from Google Patents.
US2792080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accurate landing elevator systems
Assignee: Westinghouse Electric Corp
•
Filing: 1954-08-31
•
Granted: 1957-05-14
•
Expires: 1974-08-31
Abstract
No abstract record available.
Inventors
- 👤 Dunlop James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:47
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/34; B66B1/36; B66B1/44; B66B1/24; B66B1/28; B66B1/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1758605A
Cited
US2491948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |