Patent US3538347A successfully refreshed from Google Patents.
US3538347A
Expired / Lapsed
US
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Expandable clamp circuit
Assignee: General Electric Co
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Filing: 1967-04-20
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Granted: 1970-11-03
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Expires: 1987-04-20
Abstract
No abstract record available.
Inventors
- 👤 Gaines T Spotts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:20
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2585854A
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US3070712A
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US3069618A
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US3235791A
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US3207952A
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US3379959A
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US3407260A
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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) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |