US2713995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air heating and cooling system
Assignee: WILKINSON Manufacturing Co
•
Filing: 1951-05-14
•
Granted: 1955-07-26
•
Expires: 1971-05-14
Abstract
No abstract record available.
Inventors
- 👤 Fred G Arkoosh
- 👤 Gilbert E Carpenter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:12
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00007; B60H1/00014; F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/153
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1779116A
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US1837797A
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US1837798A
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CH141819A
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US1943965A
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US2154136A
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US2266238A
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US2497450A
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US2536248A
Cited
US2551758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-25 | 1959-01-24 | 1959-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-25 | 1963-01-24 | 1963-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-25 | 1967-01-24 | 1967-07-26 | $7700.00 | Window Closed / Lapsed |