US2501674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical coupling
Assignee: MEC ELEC ENGINEERING CO
•
Filing: 1944-12-16
•
Granted: 1950-03-28
•
Expires: 1964-12-16
Abstract
No abstract record available.
Inventors
- 👤 Harold J Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:46
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/02; H01R13/28; H01R13/44; H01R13/447; H01R13/453; H01R13/4538; H01R24/00; H01R24/84
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US535278A
Cited
US889786A
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AT128226B
Cited
US1965151A
Cited
US2093037A
Cited
US2125816A
Cited
US2082986A
Cited
US2117029A
Cited
US2136848A
Cited
US2396872A
Cited
US2427297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |