US2843701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum relay
Assignee: Jennings Radio Manufacturing Corp
•
Filing: 1955-11-28
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Granted: 1958-07-15
•
Expires: 1975-11-28
Abstract
No abstract record available.
Inventors
- 👤 Lewis B Steward
- 👤 Jack S Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:46
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US665541A
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US761694A
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US890840A
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DE451596C
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GB263990A
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US1726392A
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US1941273A
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US2180661A
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US2383973A
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US2539547A
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US2476794A
Cited
US2549998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |