US2525045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling air
Assignee: Individual
•
Filing: 1946-03-05
•
Granted: 1950-10-10
•
Expires: 1966-03-05
Abstract
No abstract record available.
Inventors
- 👤 Allan S Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:39
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F3/1417; F24F5/00; F24F5/0007; F28; F28C; F28C3/00; F28C3/06; F24F2003/144
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US386777A
Cited
DE346005C
Cited
US2090287A
Cited
US2090466A
Cited
US2062771A
Cited
US2231088A
Cited
US2479408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |