Patent US2420951A successfully refreshed from Google Patents.
US3142170A
Expired / Lapsed
US
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Control apparatus
Assignee: Honeywell Inc
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Filing: 1960-12-01
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Granted: 1964-07-28
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Expires: 1980-12-01
Abstract
No abstract record available.
Inventors
- 👤 Thomas S Calhoun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:42
CPC Classifications
G; G08; G08B; G08B21/00; G08B21/18; G08B21/182; G01; G01F; G01F1/00; G01F1/68; G01F1/696; G01F1/698; H; H02; H02H; H02H5/00; H02H5/08; H02H5/086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2105430A
Cited
US2016660A
Cited
US2583561A
Cited
US2580782A
Cited
US2892347A
Cited
US2922304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |