Patent US2870862A successfully refreshed from Google Patents.
US2870862A
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US
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Means for safely exhausting hot gases
Assignee: INTERNAT FERMONT MACHINERY CO
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Filing: 1954-11-10
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Granted: 1959-01-27
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Expires: 1974-11-10
Abstract
No abstract record available.
Inventors
- 👤 Robert T Norment
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:04
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1838; F01N13/1844; F01N13/1855; E; E21; E21F; E21F5/00; F01N3/00; F01N3/02; F01N3/04; F01N3/06; F01N2230/00; F01N2230/06; F01N2450/00; F01N2450/24; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 0
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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) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |