US2943176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus for a heating device
Assignee: Westinghouse Electric Corp
•
Filing: 1956-05-10
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Granted: 1960-06-28
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Expires: 1976-05-10
Abstract
No abstract record available.
Inventors
- 👤 Calvin J Holtkamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:51
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0225; G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/2451; G05D23/2453; H01; H01H; H01H37/00; H01H37/02; H01H37/64; H01H37/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2255169A
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US2300092A
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US2303153A
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US2408047A
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US2606990A
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US2638496A
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US2819372A
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US2667566A
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US2713130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |