Patent US5153745A successfully refreshed from Google Patents.
Patent US2700657A successfully refreshed from Google Patents.
US2700657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melt-spinnable, fiber forming blend of polystyrene and specific styrene-acrylonitrile interpolymers
Assignee: Dow Chemical Co
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Filing: 1951-11-13
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Granted: 1955-01-25
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Expires: 1971-11-13
Abstract
No abstract record available.
Inventors
- 👤 Alfred T Look
- 👤 Jr Joseph N Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:53
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L25/08; C08L25/12; Y; Y10; Y10S; Y10S260/00; Y10S260/32; Y10S264/00; Y10S264/08; Y10S264/47; Y10S57/00; Y10S57/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF AN INTIMATE MIXTURE OF FROM 80 TO 98 PER CENT POLYSTYRENE AND COMPLEMENTARILY FROM 20 TO 2 PER CENT OF A COPOLYMER SELECTED FROM THE CLASS CONSISTING OF BINARY COPOLYMERS OF STYRENE AND AT LEAST 20 PER CENT ACRYLONITRILE AND TERNARY COPOLYMERS OF STYRENE AND AT LEAST 20 PER CENT OF ACRYLONITRILE AND ALPHA-METHYL STYRENE.
Claim 2
Dependent Claim
62 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF AN INTIMATE MIXTURE OF FROM 80 TO 98 PER CENT POLYSTYRENE AND COMPLEMENTARILY FROM 20 TO 2 PER CENT OF A COPOLYMER SELECTED FROM THE CLASS CONSISTING OF BINARY COPOLYMERS OF STYRENE AND AT LEAST 20 PER CENT ACRYLONITRILE AND TERNARY COPOLYMERS OF STYRENE AND AT LEAST 20 PER CENT OF ACRYLONITRILE AND ALPHA-METHYL STYRENE.
References Cited (Backward Citations)
US2123599A
Cited
US2545869A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-24 | 1958-07-26 | 1959-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-24 | 1962-07-26 | 1963-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-24 | 1966-07-26 | 1967-01-25 | $7700.00 | Window Closed / Lapsed |