Patent US997125A successfully refreshed from Google Patents.
US2767291A
Expired / Lapsed
US
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Heating apparatus
Assignee: General Electric Co
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Filing: 1954-04-07
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Granted: 1956-10-16
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Expires: 1974-04-07
Abstract
No abstract record available.
Inventors
- 👤 Jr William D Ryckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:08
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/6402; H05B6/6414; H05B6/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2356044A
Cited
US2560353A
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US2527908A
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US2500676A
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US2632090A
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US2534876A
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US2648760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |