US3000845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of promoting crystallization of isotactic polystyrene with a crystallization enhancer
Assignee: Beazer East Inc
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Filing: 1959-09-17
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Granted: 1961-09-19
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Expires: 1979-09-17
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Doak
- 👤 Arnold E Jeltsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:42
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/11; C08K5/49; C08K5/51; C08K5/52; C08K5/521; C08K5/523
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS FOR PROMOTING THE CRYSTALLIZATION OF ISOTACTIC POLYSTYRENE COMPRISING FORMING A HOMOGENEOUS MIXTURE OF ISOTACTIC POLYSTYRENE AND A CRYSTALLIZATION ENHANCER THAT IS AN ORGANIC COMPOUND CONTAINING AT LEAST 12 CARBON ATOMS WHICH IS SELECTED FROM THE CLASS CONSISTING OF TRIARYL PHOSPHATES AND ALKYL DIESTERS OF DIBASIC ACIDS, SAID CRYSTALLIZATION ENHANCER BEING PRESENT IN AN AMOUNT OF FROM 0.275 TO 0.667 PART PER PART OF CRYSTALLIZABLE POLYSTYRENE, FORMING SAID HOMOGENEOUS MIXTURE INTO A DESIRED CONFIGURATION AND THEREAFTER ANNEALING SAID FORMED MIXTURE UNTIL SAID ISOTACTIC POLYSTYRENE REACHES MAXIMUM CRYSTALLINITY.
Claim 2
Dependent Claim
88 words
A PROCESS FOR PROMOTING THE CRYSTALLIZATION OF ISOTACTIC POLYSTYRENE COMPRISING FORMING A HOMOGENEOUS MIXTURE OF ISOTACTIC POLYSTYRENE AND A CRYSTALLIZATION ENHANCER THAT IS AN ORGANIC COMPOUND CONTAINING AT LEAST 12 CARBON ATOMS WHICH IS SELECTED FROM THE CLASS CONSISTING OF TRIARYL PHOSPHATES AND ALKYL DIESTERS OF DIBASIC ACIDS, SAID CRYSTALLIZATION ENHANCER BEING PRESENT IN AN AMOUNT OF FROM 0.275 TO 0.667 PART PER PART OF CRYSTALLIZABLE POLYSTYRENE, FORMING SAID HOMOGENEOUS MIXTURE INTO A DESIRED CONFIGURATION AND THEREAFTER ANNEALING SAID FORMED MIXTURE UNTIL SAID ISOTACTIC POLYSTYRENE REACHES MAXIMUM CRYSTALLINITY.
References Cited (Backward Citations)
US2691647A
Cited
US2881156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |