US2991279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of olefin polymers
Assignee: Goodrich Gulf Chemicals Inc
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Filing: 1956-08-07
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Granted: 1961-07-04
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Expires: 1976-08-07
Abstract
No abstract record available.
Inventors
- 👤 Floyd F Miller
- 👤 David S Conner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:47
CPC Classifications
C; C08; C08C; C08C2/00; C08C2/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
THE METHOD OF TREATING A SOLUTION CONTAINING A HYDROCARBON SOLVENT AND A NORMALLY-SOLID POLYMER OF AN OPEN-CHAIN, ALIPHATIC CONJUGATED DIENE CONTAINING ABSORBED QUANTITIES OF SAID SOLVENT WHICH COMPRISES MIXING SAID SOLUTION WITH AN ALCOHOL WHILE MAINTAINING THE MIXED MATERIAL AT A TEMPERATURE IN EXCESS OF 45*C. AND UP TO 71*C., THE PROPORTION OF SAID ALCOHOL SO MIXED BEING SUFFICIENT TO CAUSE SEPARATION OF SAID POLYMER IN A DISCRETELY PARTICULATE CRUMB FORM SUSPENDED IN A MIXED HYDROCARBON SOLVENT/ALCHOL LIQUOR, DECANTING SAID LIQUOR FROM SAID CRUMBS WHILE REPLACING THE LIQUID VOLUME WITH SAID ALCOHOL, WHILE MAINTAINING THE TEMPERATURE OF SAID CRUMBS IN THE RANGE GIVEN ABOVE, AND UNTIL THE PROPORTION OF SAID HYDROCARBON SOLVENT IN THE REMAINING LIQUID IS LESS THAN ABOUT 5% BY VOLUME, SEPARATING THE CRUMBS FROM THE SAID REMAINING LIQUID CONTENTS THEREBY TO OBTAIN SAID CRUMBS LOW IN SAID HYDROCARBON SOLVENT AND SATURATED WITH SAID ALCOHOL, AND SQUEEZING SAID ALCOHOL-SATURATED CRUMBS TO REDUCE THE ALCOHOL CONTENT THEREOF.
Claim 2
Independent Claim
158 words
THE METHOD OF TREATING A SOLUTION CONTAINING A HYDROCARBON SOLVENT AND A NORMALLY-SOLID POLYMER OF AN OPEN-CHAIN, ALIPHATIC CONJUGATED DIENE CONTAINING ABSORBED QUANTITIES OF SAID SOLVENT WHICH COMPRISES MIXING SAID SOLUTION WITH AN ALCOHOL WHILE MAINTAINING THE MIXED MATERIAL AT A TEMPERATURE IN EXCESS OF 45*C. AND UP TO 71*C., THE PROPORTION OF SAID ALCOHOL SO MIXED BEING SUFFICIENT TO CAUSE SEPARATION OF SAID POLYMER IN A DISCRETELY PARTICULATE CRUMB FORM SUSPENDED IN A MIXED HYDROCARBON SOLVENT/ALCHOL LIQUOR, DECANTING SAID LIQUOR FROM SAID CRUMBS WHILE REPLACING THE LIQUID VOLUME WITH SAID ALCOHOL, WHILE MAINTAINING THE TEMPERATURE OF SAID CRUMBS IN THE RANGE GIVEN ABOVE, AND UNTIL THE PROPORTION OF SAID HYDROCARBON SOLVENT IN THE REMAINING LIQUID IS LESS THAN ABOUT 5% BY VOLUME, SEPARATING THE CRUMBS FROM THE SAID REMAINING LIQUID CONTENTS THEREBY TO OBTAIN SAID CRUMBS LOW IN SAID HYDROCARBON SOLVENT AND SATURATED WITH SAID ALCOHOL, AND SQUEEZING SAID ALCOHOL-SATURATED CRUMBS TO REDUCE THE ALCOHOL CONTENT THEREOF.
References Cited (Backward Citations)
CA514631A
Cited
US2624726A
Cited
US2683139A
Cited
US2813136A
Cited
US2728758A
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US2832759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |