US2064808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning
Assignee: Celanese Corp
•
Filing: 1934-02-08
•
Granted: 1936-12-22
•
Expires: 1954-02-08
Abstract
No abstract record available.
Inventors
- 👤 Charles F Beran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:23
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/12; Y; Y10; Y10S; Y10S261/00; Y10S261/11; Y10S261/34
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) | 1939-12-22 | 1940-06-22 | 1940-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-12-22 | 1944-06-22 | 1944-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-12-22 | 1948-06-22 | 1948-12-22 | $7700.00 | Window Closed / Lapsed |