US2980807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bistable electrical circuit
Assignee: Martin Co
•
Filing: 1957-09-17
•
Granted: 1961-04-18
•
Expires: 1977-09-17
Abstract
No abstract record available.
Inventors
- 👤 Gerhart K Groetzinger
- 👤 Schwed Philip
- 👤 Witten Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:51
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/44; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/856; Y10S505/857; Y10S505/863
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2725474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |