Patent US2831972A successfully refreshed from Google Patents.
US2831972A
Expired / Lapsed
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Pulse generator
Assignee: General Dynamics Corp
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Filing: 1954-06-04
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Granted: 1958-04-22
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Expires: 1974-06-04
Abstract
No abstract record available.
Inventors
- 👤 Howard L Foote
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:26
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/00006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2195853A
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US2252189A
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US2408086A
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US2398771A
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US2414541A
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US2503127A
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US2567846A
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US2600268A
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US2721265A
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US2765403A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |