US3088936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molten phase extraction of
Assignee: —
•
Filing: —
•
Granted: 1963-05-07
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Expires: 1980-05-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:13
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/14; C08F; C08F10/00; C08F110/00; C08F110/04; C08F110/06; C08F2/00; C08F2/12; C08F2/14; C08F210/00; C08F210/16; C08F6/00; C08F6/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE PROCESS FOR REMOVING THE LOW MOLECULAR WEIGHT POLYMER FRACTION FROM A NORMALLY SOLID CRYSTALLINE LOWER OLEFIN POLYMER MASS COMPRISING A MAJOR FRACTION OF HIGH MOLECULAR WEIGHT POLYMER MOLECULES HAVING A MOLECULAR WEIGHT ABOVE 1500 AND A MINOR FRACTION OF LOW MOLECULAR WEIGHT MOLECULES HAVING A MOLECULAR WEIGHT BELOW 1500 WHICH COMPRISES INTIMATELY CONTACTING SAID POLYMER MASS IN THE MOLTEN STATE WITH AN INERT ORGANIC LIQUID EXTRACTANT HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
71 words
THE PROCESS FOR REMOVING THE LOW MOLECULAR WEIGHT POLYMER FRACTION FROM A NORMALLY SOLID CRYSTALLINE LOWER OLEFIN POLYMER MASS COMPRISING A MAJOR FRACTION OF HIGH MOLECULAR WEIGHT POLYMER MOLECULES HAVING A MOLECULAR WEIGHT ABOVE 1500 AND A MINOR FRACTION OF LOW MOLECULAR WEIGHT MOLECULES HAVING A MOLECULAR WEIGHT BELOW 1500 WHICH COMPRISES INTIMATELY CONTACTING SAID POLYMER MASS IN THE MOLTEN STATE WITH AN INERT ORGANIC LIQUID EXTRACTANT HAVING THE GENERAL FORMULA:
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) | 1966-05-06 | 1966-11-05 | 1967-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-06 | 1970-11-05 | 1971-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-06 | 1974-11-05 | 1975-05-07 | $7700.00 | Window Closed / Lapsed |