Patent US3539838A successfully refreshed from Google Patents.
US3539838A
Expired / Lapsed
US
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Switching apparatus having a 4 rc time constant
Assignee: Honeywell Inc
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Filing: 1967-06-12
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Granted: 1970-11-10
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Expires: 1987-06-12
Abstract
No abstract record available.
Inventors
- 👤 Adrian J Moses
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:18
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/353; H03F; H03F1/00; H03F1/32; H03F1/3205; H03F3/00; H03F3/72; H03G; H03G11/00; H03G11/08; H03K5/00; H03K5/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2676262A
Cited
US2822987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |