Patent US2944806A successfully refreshed from Google Patents.
US2944806A
Expired / Lapsed
US
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Heating gases and vapours
Assignee: Power Gas Corp Ltd
•
Filing: 1957-01-23
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Granted: 1960-07-12
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Expires: 1977-01-23
Abstract
No abstract record available.
Inventors
- 👤 Carter Austin George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:44
CPC Classifications
C; C22; C22B; C22B7/00; C22B7/02; F; F28; F28D; F28D17/00; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA501230A
Cited
US2734811A
Cited
US2313157A
Cited
US2605176A
Cited
US2714058A
Cited
GB693724A
Cited
US2807528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |