US2664604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning apparatus and liquid metering device
Assignee: Individual
•
Filing: 1950-01-21
•
Granted: 1954-01-05
•
Expires: 1970-01-21
Abstract
No abstract record available.
Inventors
- 👤 George C Hein
- 👤 Hajek Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:16
CPC Classifications
F; F24; F24F; F24F8/00; F24F8/20; F24F8/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2523371A
Cited
US1964028A
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US2168850A
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US2173207A
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US2360321A
Cited
US2371044A
Cited
US2372324A
Cited
US2523373A
Cited
US2472011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |