US2593759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forced air flow air-heating furnace
Assignee: Carrier Corp
•
Filing: 1948-02-19
•
Granted: 1952-04-22
•
Expires: 1968-02-19
Abstract
No abstract record available.
Inventors
- 👤 Artemus J Horn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:39
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/10; F24H3/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1519673A
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US1673072A
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FR726200A
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FR726474A
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US1993262A
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US2216281A
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US2243609A
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US2268778A
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US2294694A
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US2368850A
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US2383676A
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US2362259A
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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) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |