US2292335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning apparatus
Assignee: Individual
•
Filing: 1941-08-27
•
Granted: 1942-08-04
•
Expires: 1961-08-27
Abstract
No abstract record available.
Inventors
- 👤 Stephen A Durbin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:00
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/044; F24F3/048; F24F3/052; F24F3/0522; F25; F25B; F25B2339/00; F25B2339/04; F25B2339/041; F25B2700/00; F25B2700/21; F25B2700/2104; F25B29/00; F25B29/003; F25B40/00; F25B41/00; F25B41/30; F25B41/31; F25B41/315; Y; Y10; Y10S; Y10S62/00; Y10S62/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-08-03 | 1946-02-02 | 1946-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-08-03 | 1950-02-02 | 1950-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-08-03 | 1954-02-02 | 1954-08-04 | $7700.00 | Window Closed / Lapsed |