Patent US3207735A successfully refreshed from Google Patents.
US3207735A
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Polymer crystallization method
Assignee: Shell USA Inc
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Filing: 1961-12-20
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Granted: 1965-09-21
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Expires: 1981-12-20
Abstract
No abstract record available.
Inventors
- 👤 Pieter W O Wijga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:09
CPC Classifications
C; C11; C11D; C11D10/00; C11D10/04; C11D10/045; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/092; C11D1/00; C11D1/66; C11D1/755
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
THE METHOD OF CRYSTALLIZING A CRYSTALLIZABLE POLYOLEFIN WHICH COMPRISES (A) PRODUCING A MELT OF (A) A NORMALLY SOLID, CRYSTALLIZABLE POLYMER OF AN ALPHA-MONOOLEFIN OF TWO TO EIGHT CARBON ATOMS PER MOLECULE CONTAINING AT LEAST TRACES OF THE RESIDUE OF A ZIEGLER POLYMERIZATION CATALYST, AND (B) AN EFFECTIVE AMOUNT, IN THE RANGE FROM 0.01 TO 5 PERCENT BY WEIGHT, OF A CRYSTALLIZATION MODIFYING CYCLIC MONOCARBOXYLIC ACID WHOSE CARBOXYL GROUP IS ATTACHED TO A CARBON ATOM OF A 5 TO 6 MEMBERED RING AND WHICH IS FREE OF OLEFINIC UNSATURATION (B) AND SOLIDIFYING SAID MELT BY COOLING IT.
Claim 2
Independent Claim
96 words
THE METHOD OF CRYSTALLIZING A CRYSTALLIZABLE POLYOLEFIN WHICH COMPRISES (A) PRODUCING A MELT OF (A) A NORMALLY SOLID, CRYSTALLIZABLE POLYMER OF AN ALPHA-MONOOLEFIN OF TWO TO EIGHT CARBON ATOMS PER MOLECULE CONTAINING AT LEAST TRACES OF THE RESIDUE OF A ZIEGLER POLYMERIZATION CATALYST, AND (B) AN EFFECTIVE AMOUNT, IN THE RANGE FROM 0.01 TO 5 PERCENT BY WEIGHT, OF A CRYSTALLIZATION MODIFYING CYCLIC MONOCARBOXYLIC ACID WHOSE CARBOXYL GROUP IS ATTACHED TO A CARBON ATOM OF A 5 TO 6 MEMBERED RING AND WHICH IS FREE OF OLEFINIC UNSATURATION (B) AND SOLIDIFYING SAID MELT BY COOLING IT.
References Cited (Backward Citations)
US2978442A
Cited
US3028363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |