US1891713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning system
Assignee: AIR CONTROL SYSTEMS Inc
•
Filing: 1932-04-16
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Granted: 1932-12-20
•
Expires: 1952-04-16
Abstract
No abstract record available.
Inventors
- 👤 Wayne D Jordan
- 👤 Paul D Van Vliet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:18
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0007; F24F5/0017; Y; Y02; Y02E; Y02E60/00; Y02E60/14; Y10; Y10S; Y10S261/00; 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) | 1935-12-20 | 1936-06-20 | 1936-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-12-20 | 1940-06-20 | 1940-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-12-20 | 1944-06-20 | 1944-12-20 | $7700.00 | Window Closed / Lapsed |