US2632306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined water heater and air conditioner of the heat pump type
Assignee: V C Patterson & Associates Inc
•
Filing: 1951-01-05
•
Granted: 1953-03-24
•
Expires: 1971-01-05
Abstract
No abstract record available.
Inventors
- 👤 Alonzo W Ruff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:55
CPC Classifications
F; F24; F24F; F24F5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2174299A
Cited
US985147A
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US1362757A
Cited
US1937288A
Cited
US2323408A
Cited
US2236191A
Cited
US2375157A
Cited
US2516094A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |