US3490436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning apparatus
Assignee: LLOYD E HART
•
Filing: 1968-02-23
•
Granted: 1970-01-20
•
Expires: 1988-02-23
Abstract
No abstract record available.
Inventors
- 👤 Lloyd E Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:52
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F11/00; F24F11/50; F24F11/61; F24F11/70; F24F11/72; F24F11/74; F24F11/76; F24F11/80; F24F11/88; F24F11/30; F24F2110/00; F24F2110/10; F24F2110/20; Y; Y10; Y10S; Y10S261/00; Y10S261/88
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |