US3131549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat pump control
Assignee: Carrier Corp
•
Filing: 1962-11-29
•
Granted: 1964-05-05
•
Expires: 1982-11-29
Abstract
No abstract record available.
Inventors
- 👤 Hal H Rhea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:08
CPC Classifications
F; F25; F25B; F25B13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
IN A HEAT PUMP, A REFRIGERATION SYSTEM COMPRISING COMPRESSION MEANS, REVERSING MEANS, AN OUTDOOR COIL, REFRIGERANT METERING MEAN AND AN INDOOR COIL INTERCONNECTED IN REFRIGERANT FLOW RELATIONSHIP, AND MEANS OPER-
Claim 2
Dependent Claim
30 words
IN A HEAT PUMP, A REFRIGERATION SYSTEM COMPRISING COMPRESSION MEANS, REVERSING MEANS, AN OUTDOOR COIL, REFRIGERANT METERING MEAN AND AN INDOOR COIL INTERCONNECTED IN REFRIGERANT FLOW RELATIONSHIP, AND MEANS OPER-
References Cited (Backward Citations)
US2276814A
Cited
US2589384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |