Patent US3257366A successfully refreshed from Google Patents.
US3257366A
Expired / Lapsed
US
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Method of partially crystallizing an alpha-olefin polymer
Assignee: EIDP Inc
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Filing: 1961-06-19
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Granted: 1966-06-21
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Expires: 1981-06-19
Abstract
No abstract record available.
Inventors
- 👤 Jr George Clark Monroe
- 👤 Vaughan Daniel James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:33
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/16; Y; Y10; Y10S; Y10S264/00; Y10S264/47
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A METHOD FOR PRODUCING A NUCLEATED COMPOSITION COMPRISING A PARTIALLY CRYSTALLINE THERMOPLASTIC POLYOLEFIN POLYMER IN INTIMATE MIXTURE WITH A NUCLEATING AGENT CONSISTING OF PARTICLES OF A SALT HAVING A PARTICLES SIZE LESS THAN 1.0U, SAID SALT BEING SELECTED FROM THE CLASS CONSISTING OF THE HALIDES OF SODIUM, POTASSIUM, RUBIDIUM AND CAESIUM, WHICH COMPRISES THE STEPS OF (1) COMMINUTING SAID HYDROCARBON POLYMER TO A FINELY DIVIDED POWDER HAVING A PARTICLE SIZE LESS THAN 10U, (2) MIXING SAID POWDER WITH FROM 1 TO 10 PARTS BY WEIGHT OF A SOLUTION OF SAID SALT IN A NON-SOLVENT FOR THE SAID POLYOLEFIN SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC ALCOHOLS HAVING FROM 1 TO 4 CARBON ATOMS AND ALIPHATIC KETONES HAVING FROM 3 TO 5 CARBON ATOMS, TOGETHER WITH SUBSTANTIALLY THE MINIMUM QUANTITY OF WATER REQUIRED TO DISSOLVE SAID SALT, THE AMOUNT OF SAID SALT BEING FROM 0.01 TO 0.5% BY WEIGHT BASED ON THE SAID HYDROCARBON POLYMER, AND (3) DRYING SAID MIXTURE AT A TEMPERATURE BELOW THE CRYSTALLINE MELTING POINT OF SAID POLYMER.
Claim 2
Independent Claim
170 words
A METHOD FOR PRODUCING A NUCLEATED COMPOSITION COMPRISING A PARTIALLY CRYSTALLINE THERMOPLASTIC POLYOLEFIN POLYMER IN INTIMATE MIXTURE WITH A NUCLEATING AGENT CONSISTING OF PARTICLES OF A SALT HAVING A PARTICLES SIZE LESS THAN 1.0U, SAID SALT BEING SELECTED FROM THE CLASS CONSISTING OF THE HALIDES OF SODIUM, POTASSIUM, RUBIDIUM AND CAESIUM, WHICH COMPRISES THE STEPS OF (1) COMMINUTING SAID HYDROCARBON POLYMER TO A FINELY DIVIDED POWDER HAVING A PARTICLE SIZE LESS THAN 10U, (2) MIXING SAID POWDER WITH FROM 1 TO 10 PARTS BY WEIGHT OF A SOLUTION OF SAID SALT IN A NON-SOLVENT FOR THE SAID POLYOLEFIN SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC ALCOHOLS HAVING FROM 1 TO 4 CARBON ATOMS AND ALIPHATIC KETONES HAVING FROM 3 TO 5 CARBON ATOMS, TOGETHER WITH SUBSTANTIALLY THE MINIMUM QUANTITY OF WATER REQUIRED TO DISSOLVE SAID SALT, THE AMOUNT OF SAID SALT BEING FROM 0.01 TO 0.5% BY WEIGHT BASED ON THE SAID HYDROCARBON POLYMER, AND (3) DRYING SAID MIXTURE AT A TEMPERATURE BELOW THE CRYSTALLINE MELTING POINT OF SAID POLYMER.
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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |