US2664245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater control
Assignee: Lummus Technology LLC
•
Filing: 1949-03-11
•
Granted: 1953-12-29
•
Expires: 1969-03-11
Abstract
No abstract record available.
Inventors
- 👤 Ward J F O'connor
- 👤 Jr Frank A Rowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:29
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1615481A
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US1895701A
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US1833153A
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US1893635A
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US2000235A
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US2217637A
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US2232219A
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US2217642A
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US2315527A
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US2217636A
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US2337851A
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US2586503A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |