US2991264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of partially crystallizing an alpha-olefin polymer
Assignee: EIDP Inc
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Filing: 1957-05-01
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Granted: 1961-07-04
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Expires: 1977-05-01
Abstract
No abstract record available.
Inventors
- 👤 Jr George Clarke Monroe
- 👤 Vaughan Daniel James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:26
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
THE METHOD OF PARTIALLY CRYSTALLIZING A PARTIALLY CRYSTALLIZABLE POLYMER SELECTED FROM THE CLASS CONSISTING OF BRANCHED POLYETHYLENE, LINEAR POLYETHYLENE, POLYPROPYLENE, AND COPOLYMERS OF ETHYLENE WITH HIGHER 1-OLEFINS, WHICH COMPRISES INTIMATELY MIXING SAID POLYMER WITH SOLID PARTICLES HAVING A PARTICLE SIZE OF FROM 1 MICRON TO 1 MILLIMICRON, MELTING THE SAID POLYMER IN THE MIXTURE, AND QUENCHING SAID MIXTURE AT CRYSTALLIZATION TEMPERATURE, SAID PARTICLES WHILE DISPERSED IN THE MOLTEN POLYMER BEING SOLID, INSOLUBLE IN THE POLYMER, AND CHEMICALLY STABLE, AND SAID PARTICLES BEING FROM 250 P.P.M. TO NOT IN EXCESS OF ABOUT 1000 P.P.M. BY WEIGHT OF SAID POLYMER, WHEREBY THE RATE OF CRYSTALLIZATION OF SAID POLYMER IS ENHANCED.
Claim 2
Independent Claim
108 words
THE METHOD OF PARTIALLY CRYSTALLIZING A PARTIALLY CRYSTALLIZABLE POLYMER SELECTED FROM THE CLASS CONSISTING OF BRANCHED POLYETHYLENE, LINEAR POLYETHYLENE, POLYPROPYLENE, AND COPOLYMERS OF ETHYLENE WITH HIGHER 1-OLEFINS, WHICH COMPRISES INTIMATELY MIXING SAID POLYMER WITH SOLID PARTICLES HAVING A PARTICLE SIZE OF FROM 1 MICRON TO 1 MILLIMICRON, MELTING THE SAID POLYMER IN THE MIXTURE, AND QUENCHING SAID MIXTURE AT CRYSTALLIZATION TEMPERATURE, SAID PARTICLES WHILE DISPERSED IN THE MOLTEN POLYMER BEING SOLID, INSOLUBLE IN THE POLYMER, AND CHEMICALLY STABLE, AND SAID PARTICLES BEING FROM 250 P.P.M. TO NOT IN EXCESS OF ABOUT 1000 P.P.M. BY WEIGHT OF SAID POLYMER, WHEREBY THE RATE OF CRYSTALLIZATION OF SAID POLYMER IS ENHANCED.
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) | 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 |