US2994784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bistable control apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1957-12-04
•
Granted: 1961-08-01
•
Expires: 1977-12-04
Abstract
No abstract record available.
Inventors
- 👤 Marshall P White
- 👤 Russell J Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:04
CPC Classifications
B; B21; B21B; B21B37/00; H; H03; H03K; H03K3/00; H03K3/02; H03K3/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL83212C
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US1998950A
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US2493785A
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US2551650A
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US2753464A
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US2751545A
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US2920214A
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US2877357A
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FR1138405A
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US2831986A
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US2922148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |