US3197973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration system with sublimator
Assignee: RTX Corp
•
Filing: 1964-10-14
•
Granted: 1965-08-03
•
Expires: 1984-10-14
Abstract
No abstract record available.
Inventors
- 👤 George C Rannenberg
- 👤 Rafael R Bawabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:03
CPC Classifications
F; F25; F25B; F25B19/00; F25B23/00; Y; Y10; Y10S; Y10S165/00; Y10S165/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
IN COMBINATION, A REFRIGERATION SYSTEM INCLUDING A SUBLIMATOR HAVING A POROUS PLATE HAVING A SURFACE SUBJECTED TO REFRIGERANT AND AN OPPOSING SURFACE SUBJECTED TO A PRESSURE BELOW THE TRIPLE POINT OF THE REFRIGERANT, SAID POROUS PLATE HAVING A PORE SIZE WHOSE MAGNITUDE IS RELATIVELOY IMPERVIOUS TO THE FLOW OF LIQUID UNDER NORMAL OPERATING PRESSURE BUT ALLOWS THE REFRIGERANT TO MIGRATE BY CAPILLARY ACTION TO THE OUTER SURFACE SO AS TO FREEZE
Claim 2
Dependent Claim
71 words
IN COMBINATION, A REFRIGERATION SYSTEM INCLUDING A SUBLIMATOR HAVING A POROUS PLATE HAVING A SURFACE SUBJECTED TO REFRIGERANT AND AN OPPOSING SURFACE SUBJECTED TO A PRESSURE BELOW THE TRIPLE POINT OF THE REFRIGERANT, SAID POROUS PLATE HAVING A PORE SIZE WHOSE MAGNITUDE IS RELATIVELOY IMPERVIOUS TO THE FLOW OF LIQUID UNDER NORMAL OPERATING PRESSURE BUT ALLOWS THE REFRIGERANT TO MIGRATE BY CAPILLARY ACTION TO THE OUTER SURFACE SO AS TO FREEZE
References Cited (Backward Citations)
US2182788A
Cited
US2461636A
Cited
US2908455A
Cited
US3138009A
Cited
US2990696A
Cited
US3100386A
Cited
US3170303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |