US3214924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of absorbing thermal energy at low temperatures and apparatus for carrying out such methods
Assignee: US Philips Corp
•
Filing: 1963-07-16
•
Granted: 1965-11-02
•
Expires: 1983-07-16
Abstract
No abstract record available.
Inventors
- 👤 Johannes Rudolphus Van Geuns
- 👤 Prast Gijsbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:32
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A METHOD OF ABSORBING THERMAL ENERGY AT LOW TEMPERATURES COMPRISING ALTERNATELY COMPRESSING A WORKING MEDIUM WHEN IT IS MAINLY CONTAINED IN AT LEAST ONE SPACE HAVING A HIGHER MEAN TEMPERATURE, AND EXPANDING SAID MEDIUM WHEN IT IS MAINLY CONTAINED IN AT LEAST ONE SPACE HAVING A LOWER MEANS TEMPERATURE, PASSING SAID MEDIUM ON ITS PATH FROM ONE SPACE TO ANOTHER THROUGH A HEAT EXCHANGER THEREBY DELIVERING THERMAL ENERGY THERETO WHEN FLOWING TO SAID EXPANSION SPACE AND ABSORBING THERMAL ENERGY THEREFROM WHEN FLOWING FROM SAID EXPANSION SPACE, MAINTAINING THE PRESSURE OF SAID MEDIUM CONTINUOUSLY HIGHER THAN A PRESSURE WHICH IS SUBSTANTIALLY EQUAL TO THE CRITICAL PRESSUR OF SAID MEDIUM, AND MAINTAINING THE TEMPERATURE AT WHICH THE EXPANSION TAKES PLACE IN AT LEAST ONE OF SAID SPACES BELOW THE CRITICAL TEMPERATURE OF SAID MEDIUM.
Claim 2
Independent Claim
132 words
A METHOD OF ABSORBING THERMAL ENERGY AT LOW TEMPERATURES COMPRISING ALTERNATELY COMPRESSING A WORKING MEDIUM WHEN IT IS MAINLY CONTAINED IN AT LEAST ONE SPACE HAVING A HIGHER MEAN TEMPERATURE, AND EXPANDING SAID MEDIUM WHEN IT IS MAINLY CONTAINED IN AT LEAST ONE SPACE HAVING A LOWER MEANS TEMPERATURE, PASSING SAID MEDIUM ON ITS PATH FROM ONE SPACE TO ANOTHER THROUGH A HEAT EXCHANGER THEREBY DELIVERING THERMAL ENERGY THERETO WHEN FLOWING TO SAID EXPANSION SPACE AND ABSORBING THERMAL ENERGY THEREFROM WHEN FLOWING FROM SAID EXPANSION SPACE, MAINTAINING THE PRESSURE OF SAID MEDIUM CONTINUOUSLY HIGHER THAN A PRESSURE WHICH IS SUBSTANTIALLY EQUAL TO THE CRITICAL PRESSUR OF SAID MEDIUM, AND MAINTAINING THE TEMPERATURE AT WHICH THE EXPANSION TAKES PLACE IN AT LEAST ONE OF SAID SPACES BELOW THE CRITICAL TEMPERATURE OF SAID MEDIUM.
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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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |