US3512010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching circuit with hysteresis
Assignee: Combustion Engineering Inc
•
Filing: 1967-09-25
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Granted: 1970-05-12
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Expires: 1987-09-25
Abstract
No abstract record available.
Inventors
- 👤 Ernest A Washburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:17
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286; H03K3/2893; H03K17/00; H03K17/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3106646A
Cited
US3050642A
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US3246080A
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US3421018A
Cited
US3453448A
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US3445680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |