US2561067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple stage air-conditioning system
Assignee: Honeywell Inc
•
Filing: 1945-08-17
•
Granted: 1951-07-17
•
Expires: 1965-08-17
Abstract
No abstract record available.
Inventors
- 👤 Alwin B Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:17
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/30; F24F11/62; F24F11/88; F25; F25B; F25B2400/00; F25B2400/07; F25B2400/075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2011787A
Cited
US1902979A
Cited
US2291769A
Cited
US2381427A
Cited
US2364459A
Cited
US2352930A
Cited
US2403798A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |