Patent US3719263A successfully refreshed from Google Patents.
Patent US2801987A successfully refreshed from Google Patents.
US2801987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color stabilization of acrylonitrile polymers
Assignee: Wyeth Holdings LLC
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Filing: 1953-05-18
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Granted: 1957-08-06
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Expires: 1973-05-18
Abstract
No abstract record available.
Inventors
- 👤 Fortune James Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:37
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A RESINOUS COMPOSITION HAVING INCREASED COLOR STABILITY WHICH COMPRISES THE POLYMERIZATION PRODUCT OF FROM ABOUT 10% TO ABOUT 70% BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE AND ALKYL SUBSTITUTED ACRYLONITRILE WHEREIN THE ALKLY GROU CONTAINS, FROM 1 TO 4 CARBON ATOMS AND FROM ABOUT 90% TO ABOUT 30% BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE, NUCLEAR SUBSTITUTED METHYL STYRENE, NUCLEAR SUBSTITUTED DIMETHYL STYRENE, NUCLEAR SUBSTITUTED THYL STYRENE, NUCLEAR SUBSTITUED DIETHYL STYRENE, NUCLEAR SUBSTITUTED CHLORO STYRENE AND NUCLEAR SUBSTITUTED DICHLORO STYRENE, AND DISPERSED THEREIN FROM ABOUT 0.005% TO ABOUT 5% BY WEIGHT BASED ON THE TOTAL WEIGHT OF A COLOR STABILIZER SELECTED FROM THR GROUP CONSISTING OF ZINC PHENYL DITHIOCARBAMATE, A COMPOUND REPRESENTED BY THE GENERAL FORMULA
Claim 2
Dependent Claim
126 words
A RESINOUS COMPOSITION HAVING INCREASED COLOR STABILITY WHICH COMPRISES THE POLYMERIZATION PRODUCT OF FROM ABOUT 10% TO ABOUT 70% BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE AND ALKYL SUBSTITUTED ACRYLONITRILE WHEREIN THE ALKLY GROU CONTAINS, FROM 1 TO 4 CARBON ATOMS AND FROM ABOUT 90% TO ABOUT 30% BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE, NUCLEAR SUBSTITUTED METHYL STYRENE, NUCLEAR SUBSTITUTED DIMETHYL STYRENE, NUCLEAR SUBSTITUTED THYL STYRENE, NUCLEAR SUBSTITUED DIETHYL STYRENE, NUCLEAR SUBSTITUTED CHLORO STYRENE AND NUCLEAR SUBSTITUTED DICHLORO STYRENE, AND DISPERSED THEREIN FROM ABOUT 0.005% TO ABOUT 5% BY WEIGHT BASED ON THE TOTAL WEIGHT OF A COLOR STABILIZER SELECTED FROM THR GROUP CONSISTING OF ZINC PHENYL DITHIOCARBAMATE, A COMPOUND REPRESENTED BY THE GENERAL FORMULA
References Cited (Backward Citations)
US2310449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |