US2690656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of air conditioning
Assignee: Individual
•
Filing: 1949-03-24
•
Granted: 1954-10-05
•
Expires: 1969-03-24
Abstract
No abstract record available.
Inventors
- 👤 Cummings William Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:17
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F3/1417; F24F2003/144
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2355828A
Cited
US1937984A
Cited
US1943908A
Cited
US2223586A
Cited
US2269053A
Cited
US2421121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |