Patent US2641234A successfully refreshed from Google Patents.
US2641234A
Expired / Lapsed
US
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Heater
Assignee: Lummus Technology LLC
•
Filing: 1948-01-23
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Granted: 1953-06-09
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Expires: 1968-01-23
Abstract
No abstract record available.
Inventors
- 👤 Mekler Valentine
- 👤 Marcel J P Bogart
- 👤 Otto C Schauble
- 👤 Edward H Palchik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:19
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/18; C10G9/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1747421A
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US2147609A
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US1962502A
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US2090504A
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US2147610A
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US2218495A
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US2212526A
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US2330188A
Cited
US2445316A
Cited
US2415726A
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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) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |