US2931876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric contact
Assignee: McGraw Edison Co
•
Filing: 1957-04-17
•
Granted: 1960-04-05
•
Expires: 1977-04-17
Abstract
No abstract record available.
Inventors
- 👤 William J Weinfurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:56
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/36; H01H1/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |