US2277138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning system
Assignee: Honeywell Inc
•
Filing: 1938-08-31
•
Granted: 1942-03-24
•
Expires: 1958-08-31
Abstract
No abstract record available.
Inventors
- 👤 Alwin B Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:33
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/002; F25B9/006; F24; F24F; F24F11/00; F24F11/30; F24F11/70; F24F11/80; F24F11/83; F24F11/84; F25B2309/00; F25B2309/06; F25B2400/00; F25B2400/16; F25B9/008; Y; Y10; Y10S; Y10S62/00; Y10S62/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1945-03-23 | 1945-09-22 | 1946-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-03-23 | 1949-09-22 | 1950-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-03-23 | 1953-09-22 | 1954-03-24 | $7700.00 | Window Closed / Lapsed |