Patent US2591235A successfully refreshed from Google Patents.
US2591235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Individual vertical-type fuelburning heater
Assignee: Carrier Corp
•
Filing: 1948-05-07
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Granted: 1952-04-01
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Expires: 1968-05-07
Abstract
No abstract record available.
Inventors
- 👤 William G Cartter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:42
CPC Classifications
F; F23; F23D; F23D14/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US873842A
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US972905A
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US1140910A
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US1925744A
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US1991788A
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GB436681A
Cited
GB447840A
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US2190349A
Cited
GB502945A
Cited
US2439038A
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US2539512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |