US2770445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning apparatus
Assignee: JET HEET Inc
•
Filing: 1953-06-22
•
Granted: 1956-11-13
•
Expires: 1973-06-22
Abstract
No abstract record available.
Inventors
- 👤 Calvin D Maccracken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:33
CPC Classifications
F; F24; F24D; F24D5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US186051A
Cited
US843909A
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US1296968A
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US1749417A
Cited
US2294038A
Cited
US2327664A
Cited
US2495861A
Cited
US2609743A
Cited
US2613587A
Cited
US2551751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |