US3553156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of ethylene copolymer elastomers from their solvent solutions
Assignee: EIDP Inc
•
Filing: 1966-12-15
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Granted: 1971-01-05
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Expires: 1986-12-15
Abstract
Abstract SEPARATION OF SULFUR-CURABLE ETHYLENE COPOLYMER ELASTOMERS (E.G., ETHYLENE, PROPYLENE, 1,4-HEXADIENE COPOLYMERS) FROM THEIR SOLUTIONS IN SOLVENTS (E.G., HEXANE) BY HEATING UNDER PRESSURE TO A POINT WHERE TWO LIQUID PHASES FORM, THE BOTTOM PHASE CONTAINING MOST ALL THE ELASTOMER, DECANTING THE BOTTOM PHASE AND FLASHING OFF THE SOLVENT THEREFROM TO ISOLATE SOLVENT-FREE ELASTOMER. BLACK CAN BE INCORPORATED BY MIXING INTO SOLUTION BEFORE DECANTATION. IF PROCESSING OIL IS TO BE INCLUDED, IT IS MIXED IN AFTER DECANTATION BUT BEFORE FLASHING, WHEREAS IF BOTH BLACK AND OIL ARE TO BE INCLUDED, THEY ARE MIXED IN BEFORE DECANTATION.
Inventors
- 👤 Colin Anolick
- 👤 Edward Peter Goffinet Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:51
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/06; C08F6/12; Y; Y10; Y10S; Y10S159/00; Y10S159/10
Claims Analysis
Total Claims: 0
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |