US3009331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning systems
Assignee: Individual
•
Filing: 1958-05-05
•
Granted: 1961-11-21
•
Expires: 1978-05-05
Abstract
No abstract record available.
Inventors
- 👤 John B Hewett
- 👤 Elwood A Windham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:14
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F3/1417; F24F5/00; F24F5/0089; F24F2003/144; Y; Y10; Y10S; Y10S62/00; Y10S62/01
Claims Analysis
Total Claims: 0
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US2416354A
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US2690656A
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US2660409A
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US2971350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |