Patent US2701294A successfully refreshed from Google Patents.
US2701294A
Expired / Lapsed
US
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Heating unit for incinerators
Assignee: Calcinator Corp
•
Filing: 1952-02-01
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Granted: 1955-02-01
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Expires: 1972-02-01
Abstract
No abstract record available.
Inventors
- 👤 John W Hebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:09
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/08; F23G5/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1129381A
Cited
GB329478A
Cited
US2109163A
Cited
US2525850A
Cited
US2488405A
Cited
US2547402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-31 | 1958-08-02 | 1959-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-31 | 1962-08-02 | 1963-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-31 | 1966-08-02 | 1967-02-01 | $7700.00 | Window Closed / Lapsed |