US3250313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporation and separation control process
Assignee: Phillips Petroleum Co
•
Filing: 1962-07-16
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Granted: 1966-05-10
•
Expires: 1982-07-16
Abstract
No abstract record available.
Inventors
- 👤 Howard B Irvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:48
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/0082; Y; Y10; Y10S; Y10S159/00; Y10S159/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PROCESS WHICH COMPRISES PASSING A SOLVENT SOLUTION OF A RUBBERY POLYMER TO A STRIPPING ZONE, PASSING WATER TO SAID STRIPPING ZONE AND THEREIN INTIMATELY CONTACTING SAID SOLVENT SOLUTION OF SAID RUBBERY POLYMER PASSING STEAM TO THE LOWER REGION AND SAID STRIPPING ZONE AND THEREIN MAINTANING STRIPPING CONTACT WITH SAID SOLUTION AND SAID WATER, WITHDRAWING A VAPOR FROM THE UPPER REGION OF SAID STRIPPING ZONE COMPRISING STEAM AND SOLVENT VAPOR, AND WITHDRAWING FROM THE LOWER REGION OF SAID STRIPPING ZONE A SLURRY COMPRISINGWATER AND RUBBERY POLYMER; A METHOD OF CONTROL WHICH COMPRISES PASSING A FIRST SIGNAL REPRESENTATIVE OF THE TOTAL PRESSURE IN THE UPPER REGION OF SAID STRIPPING ZONE TO A COMPUTING ZONE, SAID COMPUTING ZONE SOLVING THE FOLLOWING EQUATION:
Claim 2
Dependent Claim
120 words
A PROCESS WHICH COMPRISES PASSING A SOLVENT SOLUTION OF A RUBBERY POLYMER TO A STRIPPING ZONE, PASSING WATER TO SAID STRIPPING ZONE AND THEREIN INTIMATELY CONTACTING SAID SOLVENT SOLUTION OF SAID RUBBERY POLYMER PASSING STEAM TO THE LOWER REGION AND SAID STRIPPING ZONE AND THEREIN MAINTANING STRIPPING CONTACT WITH SAID SOLUTION AND SAID WATER, WITHDRAWING A VAPOR FROM THE UPPER REGION OF SAID STRIPPING ZONE COMPRISING STEAM AND SOLVENT VAPOR, AND WITHDRAWING FROM THE LOWER REGION OF SAID STRIPPING ZONE A SLURRY COMPRISINGWATER AND RUBBERY POLYMER; A METHOD OF CONTROL WHICH COMPRISES PASSING A FIRST SIGNAL REPRESENTATIVE OF THE TOTAL PRESSURE IN THE UPPER REGION OF SAID STRIPPING ZONE TO A COMPUTING ZONE, SAID COMPUTING ZONE SOLVING THE FOLLOWING EQUATION:
References Cited (Backward Citations)
US390960A
Cited
US2684326A
Cited
US2737965A
Cited
US2748849A
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US2890156A
Cited
US2882693A
Cited
US2994643A
Cited
US3050450A
Cited
US3108929A
Cited
US3042637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |