Patent US2978997A successfully refreshed from Google Patents.
US2978997A
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US
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Method and apparatus for the continuous combustion of refuse and the like
Assignee: Individual
•
Filing: 1957-11-13
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Granted: 1961-04-11
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Expires: 1977-11-13
Abstract
No abstract record available.
Inventors
- 👤 Edgar M Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:50
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/44; F23G5/442; F23G5/444; F23G5/02; F23K; F23K3/00; F23K2203/00; F23K2203/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1478875A
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US1840374A
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US1772285A
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US1782996A
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US2014796A
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US2386336A
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US2684754A
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US2763220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |