US3290278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of poly
Assignee: Petro Tex Chemical Corp
•
Filing: 1963-10-01
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Granted: 1966-12-06
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Expires: 1983-10-01
Abstract
No abstract record available.
Inventors
- 👤 Billy D Rice
- 👤 Jr Thomas G Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:37
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/06; C08F6/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A PROCESS FOR SEPARATING A BUTENE-1 POLYMER IN PARTICULATE FORM FROM A SOLUTION OF BUTENE-1 POLYMER IN A HYDROCARBON SOLVENT WHICH COMPRISES PASSING THE POLYMER SOLUTION IN WHICH THE BUTEME-1 POLYMER IS PRESENT IN AMOUNTS OF LESS THAN 20 PERCENT BY WEIGHT OF POLYMER SOLUTION THROUGH A HEATED ELONGATED TUBE EXPANDER HAVING AN INLET AND OUTLET END IN WHICH THE CROSS SECTIONAL AREA OF THE OUTLET END OF THE EXPANDER IS AT LEAST THREE TIMES THAT OF THE INLET END OF THE EXPANDER AND MAINTAINING A PRESSURE CHANGE OF LESS THAN 10 P.S.I.G. PER LINER FOOT OF EXPANDER WHILE MAINTAINING A VAPOR-POLYMER VELOCITY OF BETWEEN 35 TO 400 FEET PER SECOND THERETHROUGH.
Claim 2
Dependent Claim
112 words
A PROCESS FOR SEPARATING A BUTENE-1 POLYMER IN PARTICULATE FORM FROM A SOLUTION OF BUTENE-1 POLYMER IN A HYDROCARBON SOLVENT WHICH COMPRISES PASSING THE POLYMER SOLUTION IN WHICH THE BUTEME-1 POLYMER IS PRESENT IN AMOUNTS OF LESS THAN 20 PERCENT BY WEIGHT OF POLYMER SOLUTION THROUGH A HEATED ELONGATED TUBE EXPANDER HAVING AN INLET AND OUTLET END IN WHICH THE CROSS SECTIONAL AREA OF THE OUTLET END OF THE EXPANDER IS AT LEAST THREE TIMES THAT OF THE INLET END OF THE EXPANDER AND MAINTAINING A PRESSURE CHANGE OF LESS THAN 10 P.S.I.G. PER LINER FOOT OF EXPANDER WHILE MAINTAINING A VAPOR-POLYMER VELOCITY OF BETWEEN 35 TO 400 FEET PER SECOND THERETHROUGH.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |