US2642164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swinging door
Assignee: AT&T Inc
•
Filing: 1950-01-20
•
Granted: 1953-06-16
•
Expires: 1970-01-20
Abstract
No abstract record available.
Inventors
- 👤 Mclean Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:48
CPC Classifications
E; E05; E05D; E05D3/00; E05D1/00; E05D1/02; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US184086A
Cited
US864931A
Cited
US1090562A
Cited
US1249814A
Cited
US1363921A
Cited
US2121826A
Cited
US2122532A
Cited
US2200240A
Cited
US2279572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |