US2225795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning apparatus
Assignee: Individual
•
Filing: 1937-06-26
•
Granted: 1940-12-24
•
Expires: 1957-06-26
Abstract
No abstract record available.
Inventors
- 👤 Frederick E Pernot
- 👤 Lester J Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:23
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0007; F24F1/00; F24F1/0007; F24F1/0035; F24F1/0038; F24F1/0059; F24F1/0063; F24F1/0071; Y; Y02; Y02B; Y02B30/00; Y02B30/54
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) | 1943-12-24 | 1944-06-24 | 1944-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-24 | 1948-06-24 | 1948-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-24 | 1952-06-24 | 1952-12-24 | $7700.00 | Window Closed / Lapsed |