US3265648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystallization of poly-1-butene in the presence of stearic acid or biphenyl
Assignee: Shell USA Inc
•
Filing: 1961-12-28
•
Granted: 1966-08-09
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Expires: 1981-12-28
Abstract
No abstract record available.
Inventors
- 👤 Jr John Boor
- 👤 Edward A Youngman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:19
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/01; C08K5/04; C08K5/09; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE METHOD OF ACCELARATING THE TRANSFORMATION OF CRYSTALLINE POLY-1-BUTENE FROM THE CRYSTAL FORM WHICH IS CHARACTERIZED BY A HELICAL CHAIN STRUCTURE OF 4-FOLD SYMMETRY WITH AN IDENTITY PERIOD OF 6.8 A. AND WHICH IS UNSTABLE AT AMBIENT TEMPERATURES TO THE CRYSTAL FROM WHICH IS CHARACTERIZED BY A HELICAL CHAIN STRUCTURE OF 3-FOLD SYMMETRY WITH AN IDENTITY PERIOD OF 6.5 A. AND WHICH IS STABLE AT AMBIENT TEMPERATURE, WHICH COMPRISES PRODUCING A MELT OF CRYSTALLIZABLE POLY-1-BUTENE HAVING HOMOGENEOUSLY DISPERSED THEREIN A CRYSTALLIZATION MODIFYING AMOUNT, IN THE RANGE FROM 0.1 TO 5% BY WEIGHT, OF STEARIC ACID, AND COOLING SAID MELT TO A TEMPERATURE BETWEEN 0* AND ABOUT 40*C.
Claim 2
Independent Claim
107 words
THE METHOD OF ACCELARATING THE TRANSFORMATION OF CRYSTALLINE POLY-1-BUTENE FROM THE CRYSTAL FORM WHICH IS CHARACTERIZED BY A HELICAL CHAIN STRUCTURE OF 4-FOLD SYMMETRY WITH AN IDENTITY PERIOD OF 6.8 A. AND WHICH IS UNSTABLE AT AMBIENT TEMPERATURES TO THE CRYSTAL FROM WHICH IS CHARACTERIZED BY A HELICAL CHAIN STRUCTURE OF 3-FOLD SYMMETRY WITH AN IDENTITY PERIOD OF 6.5 A. AND WHICH IS STABLE AT AMBIENT TEMPERATURE, WHICH COMPRISES PRODUCING A MELT OF CRYSTALLIZABLE POLY-1-BUTENE HAVING HOMOGENEOUSLY DISPERSED THEREIN A CRYSTALLIZATION MODIFYING AMOUNT, IN THE RANGE FROM 0.1 TO 5% BY WEIGHT, OF STEARIC ACID, AND COOLING SAID MELT TO A TEMPERATURE BETWEEN 0* AND ABOUT 40*C.
References Cited (Backward Citations)
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Cited
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Cited
US2925398A
Cited
US3018263A
Cited
US3017238A
Cited
US3205185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |