Patent US2800552A successfully refreshed from Google Patents.
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 17:46
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/02; H01H50/00; H01H50/54; H01H50/02; H01H50/04; H01H2050/049
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1393701A
Cited
US1669564A
Cited
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 |