Patent US2920246A successfully refreshed from Google Patents.
US2920246A
Expired / Lapsed
US
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Switch bank insulating element
Assignee: General Telephone Laboratories Inc
•
Filing: 1956-05-02
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Granted: 1960-01-05
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Expires: 1976-05-02
Abstract
No abstract record available.
Inventors
- 👤 Gienger Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:43
CPC Classifications
H; H01; H01H; H01H63/00; H01H63/02; H01H63/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1283563A
Cited
US1562647A
Cited
US1938752A
Cited
US2087330A
Cited
US2057865A
Cited
US2487282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |