US2811602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic relays
Assignee: Telephone Manufacturing Co Ltd
•
Filing: 1953-05-15
•
Granted: 1957-10-29
•
Expires: 1973-05-15
Abstract
No abstract record available.
Inventors
- 👤 Rommel Frederick Emil
- 👤 Carpenter Rupert Evan Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:19
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/22; H01H51/2272; H01H51/2281
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1191976A
Cited
US1426993A
Cited
US1541618A
Cited
US1743494A
Cited
US1826990A
Cited
US2351588A
Cited
US2412123A
Cited
US2619560A
Cited
US2515771A
Cited
US2597873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |