Patent US2811602A successfully refreshed from Google Patents.
US2811602A
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US
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Electromagnetic relays
Assignee: Telephone Manufacturing Co Ltd
•
Filing: 1953-05-15
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Granted: 1957-10-29
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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
2026-10-30 19:45
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/22; H01H51/2272; H01H51/2281
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1191976A
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US1426993A
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US1541618A
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US1743494A
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US1826990A
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US2351588A
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US2412123A
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US2619560A
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US2515771A
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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 |