US2951055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of acrylonitrile copolymers
Assignee: Wyeth Holdings LLC
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Filing: 1959-01-30
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Granted: 1960-08-30
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Expires: 1979-01-30
Abstract
No abstract record available.
Inventors
- 👤 Lionel B Luttinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/524; C08K5/526
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A RESINOUS COMPOSITION HAVING INCREASED COLOR STABILITY WHICH COMPRISES THE POLYMERIZATION PRODUCT OF FROM ABOUT 5% TO ABOUT 40% BY WEIGHT OF ACRYLONITRILE AND FROM ABOUT 95% TO ABOUT 60% BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE AND METHYLSTYRENE, AND DISPERSED THEREIN FROM ABOUT 0.002% TO ABOUT 2% BY WEIGHT BASED ON THE WEIGHT OF THE MONOMER OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF TRIISOCTYL PHOSPHITE AND PHOSPHOROUS ACID-(2,2-BIS(PHENOXYPHOSPHINOOXYMETHYL)TRIMETHYLENE) TETRAPHENYL ESTER.
Claim 2
Dependent Claim
78 words
A RESINOUS COMPOSITION HAVING INCREASED COLOR STABILITY WHICH COMPRISES THE POLYMERIZATION PRODUCT OF FROM ABOUT 5% TO ABOUT 40% BY WEIGHT OF ACRYLONITRILE AND FROM ABOUT 95% TO ABOUT 60% BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE AND METHYLSTYRENE, AND DISPERSED THEREIN FROM ABOUT 0.002% TO ABOUT 2% BY WEIGHT BASED ON THE WEIGHT OF THE MONOMER OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF TRIISOCTYL PHOSPHITE AND PHOSPHOROUS ACID-(2,2-BIS(PHENOXYPHOSPHINOOXYMETHYL)TRIMETHYLENE) TETRAPHENYL ESTER.
References Cited (Backward Citations)
US2878229A
Cited
US2878227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-30 | 1964-02-29 | 1964-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-30 | 1968-02-29 | 1968-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-30 | 1972-02-29 | 1972-08-30 | $7700.00 | Window Closed / Lapsed |