US2908780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum relay
Assignee: Jennings Radio Manufacturing Corp
•
Filing: 1957-11-01
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Granted: 1959-10-13
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Expires: 1977-11-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Howard W Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:58
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/64; H01H1/66; H01H33/00; H01H33/60; H01H33/66; H01H51/00; H01H51/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US803486A
Cited
US1510455A
Cited
US2197715A
Cited
US2323702A
Cited
US2395870A
Cited
US2523360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |