US2487016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone substation apparatus
Assignee: AT&T Inc
•
Filing: 1946-09-11
•
Granted: 1949-11-01
•
Expires: 1966-09-11
Abstract
No abstract record available.
Inventors
- 👤 Edwin A Bescherer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:40
CPC Classifications
B; B60; B60R; B60R11/00; B60R11/02; B60R11/0241; B60R2011/0042; B60R2011/0049; B60R2011/0064; B60R2011/0071
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2163006A
Cited
US2375681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-31 | 1953-05-02 | 1953-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-31 | 1957-05-02 | 1957-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-31 | 1961-05-02 | 1961-11-01 | $7700.00 | Window Closed / Lapsed |