US3220203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simultaneous heat and mass transfer process
Assignee: Alltech Associates Inc
•
Filing: 1965-01-11
•
Granted: 1965-11-30
•
Expires: 1985-01-11
Abstract
No abstract record available.
Inventors
- 👤 Rose Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:03
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/22; C02F2103/00; C02F2103/08; Y; Y02; Y02A; Y02A20/00; Y02A20/124; Y10; Y10S; Y10S159/00; Y10S159/05; Y10S159/33; Y10S203/00; Y10S203/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN THE PURIFICATION OF A SOLUTION BY PARTIAL FREEZING EFFECTED THROUGH DIRECT CONTACT BETWEEN SAID SOLUTION AND A REFRIGERANT OF LIMITED SOLUBILITY IN SAID SOLUTION, THE IMPROVEMENT OF REMOVING THE RESIDUAL REFRIGERANT FROM THE CONCENTRATED AND PURIFIED LIQUID PORDUCT SOLUTIONS BY PASSAGE THEREOF AS COLD STREAMS IN PORXIMITY TO BUT OUT OF DIRECT CONTACT WITH A STREAM OF RAW FEED SOLUTION WHICH IS OF A SUBSTANTIALLY HIGHER TEMPERATURE THAN THE CONCENTRATED AND PURIFIED SOLUTION STREAMS WHILE ALLOWING FREE VAPOR TRANSFER BETWEEN THE THREE STREAMS; WHEREBY THE RESIDUAL REFRIGERANT IS VAPORIZED SUBSTANTIALLY FROM SAID CONCENTRATED AND PURIFIED STREAMS AND DISSOLVED IN SAID FEED SOLUTION STREAM.
Claim 2
Dependent Claim
104 words
IN THE PURIFICATION OF A SOLUTION BY PARTIAL FREEZING EFFECTED THROUGH DIRECT CONTACT BETWEEN SAID SOLUTION AND A REFRIGERANT OF LIMITED SOLUBILITY IN SAID SOLUTION, THE IMPROVEMENT OF REMOVING THE RESIDUAL REFRIGERANT FROM THE CONCENTRATED AND PURIFIED LIQUID PORDUCT SOLUTIONS BY PASSAGE THEREOF AS COLD STREAMS IN PORXIMITY TO BUT OUT OF DIRECT CONTACT WITH A STREAM OF RAW FEED SOLUTION WHICH IS OF A SUBSTANTIALLY HIGHER TEMPERATURE THAN THE CONCENTRATED AND PURIFIED SOLUTION STREAMS WHILE ALLOWING FREE VAPOR TRANSFER BETWEEN THE THREE STREAMS; WHEREBY THE RESIDUAL REFRIGERANT IS VAPORIZED SUBSTANTIALLY FROM SAID CONCENTRATED AND PURIFIED STREAMS AND DISSOLVED IN SAID FEED SOLUTION STREAM.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |