US3253774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerating apparatus
Assignee: Motors Liquidation Co
•
Filing: 1964-12-28
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Granted: 1966-05-31
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Expires: 1984-12-28
Abstract
No abstract record available.
Inventors
- 👤 Howard H Dietrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:31
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/32; B60H1/3204; B60H1/3205; B60H1/3216; B60H2001/3236; B60H2001/3238; B60H2001/3269; Y; Y10; Y10T; Y10T137/00; Y10T137/1407
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
IN AN AUTOMOBILE AIR CONDITIONING SYSTEM, THE COMBINATION OF, AN INTERNAL COMBUSTION ENGINE HAVING AN AIR INTAKE, A THROTTLE VALVE CONTROLLING FLOW THROUGH SAID INTAKE, A REFRIGERANT COMPRESSOR DRIVEN BY SAID ENGINE, MAGNETIC CLUTCH MEANS FOR SELECTIVELY CONNECTING SAID REFRIGERANT COMPRESSOR IN DIRECT DRIVE RELATIONSHIP WITH SAID ENGINE WHEN ENERGIZED, AND PERMANENT MAGNET MEANS RESPONSIVE TO THE MAGNETIC FLUX FIELD PRODUCED BY ENERGIZATION OF SAID MAGNETIC CLUTCH FOR DIRECTING ADDITIONAL AIR
Claim 2
Dependent Claim
71 words
IN AN AUTOMOBILE AIR CONDITIONING SYSTEM, THE COMBINATION OF, AN INTERNAL COMBUSTION ENGINE HAVING AN AIR INTAKE, A THROTTLE VALVE CONTROLLING FLOW THROUGH SAID INTAKE, A REFRIGERANT COMPRESSOR DRIVEN BY SAID ENGINE, MAGNETIC CLUTCH MEANS FOR SELECTIVELY CONNECTING SAID REFRIGERANT COMPRESSOR IN DIRECT DRIVE RELATIONSHIP WITH SAID ENGINE WHEN ENERGIZED, AND PERMANENT MAGNET MEANS RESPONSIVE TO THE MAGNETIC FLUX FIELD PRODUCED BY ENERGIZATION OF SAID MAGNETIC CLUTCH FOR DIRECTING ADDITIONAL AIR
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |