US2800552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relay unit
Assignee: General Patent Corp
•
Filing: 1954-07-09
•
Granted: 1957-07-23
•
Expires: 1974-07-09
Abstract
No abstract record available.
Inventors
- 👤 Lyndon A Durant
- 👤 Marcine P Wolverton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:20
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/02; H01H50/00; H01H50/54; H01H50/02; H01H50/04; H01H2050/049
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1393701A
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US1669564A
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US1692604A
Cited
USRE20094E
Cited
US2064631A
Cited
US2267427A
Cited
US2407418A
Cited
US2431025A
Cited
US2413135A
Cited
US2462894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |