US3277659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration
Assignee: American Air Filter Co Inc
•
Filing: 1964-07-17
•
Granted: 1966-10-11
•
Expires: 1984-07-17
Abstract
No abstract record available.
Inventors
- 👤 Stig G Sylvan
- 👤 Arnold B Medbery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:00
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/04; F25B1/06; Y; Y10; Y10S; Y10S62/00; Y10S62/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
IN A REFRIGERANT METHOD: SUPERHEATING A VAPOROUS REFRIGERANT TO A TEMPERATURE APPROXIMATING THE CONDENSER TEMPERATURE; AND THEN PASSING SAID VAPOROUS REFRIGERANT THROUGH A COMPRESSION DEVICE ALONG WITH A LIQUID MEDIUM, ALSO HAVING A TEMPERATURE APPROXIMATING SAID CONDENSER TEMPERATURE, TO EFFECT A SUBSTANTIALLY ISOTHERMAL COMPRESSION OF SAID VAPOROUS REFRIGERANT.
Claim 2
Dependent Claim
48 words
IN A REFRIGERANT METHOD: SUPERHEATING A VAPOROUS REFRIGERANT TO A TEMPERATURE APPROXIMATING THE CONDENSER TEMPERATURE; AND THEN PASSING SAID VAPOROUS REFRIGERANT THROUGH A COMPRESSION DEVICE ALONG WITH A LIQUID MEDIUM, ALSO HAVING A TEMPERATURE APPROXIMATING SAID CONDENSER TEMPERATURE, TO EFFECT A SUBSTANTIALLY ISOTHERMAL COMPRESSION OF SAID VAPOROUS REFRIGERANT.
References Cited (Backward Citations)
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US2014701A
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US2088609A
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US2602306A
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US2797554A
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US3163998A
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US3159008A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |