US2804444A
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: 1957-08-27
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Expires: 1973-05-18
Abstract
No abstract record available.
Inventors
- 👤 Nicholas R Segro
- 👤 James A Melchore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:35
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A RESINOUS COMPOSITION HAVING INCREASED COLOR STABILITY TO HEAT 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 ALKYL GROUP 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 SUBTITUTED METHYLSTYRENE, NUCLEAR SUBSTITUTED DIMETHYLSTYRENE, NUCLEAR SUBSTITUTED ETHYLSTYRENE, NUCLEAR SUBSTITUTED DIETHYLSTYRENE AND MONO- AND DI-CHLOROSTYRENE, AND DISPERSED THEREIN FROM ABOUT 0.005% TO ABOUT 5% BY WEIGHT BASED ON THE TOTAL WEIGHT OF A COLOR STABILIZER SELECTED FROM THE GROUP CONSISTING OF A COMPOUND REPRESENTED BY THE GENERAL FORMULA
Claim 2
Dependent Claim
116 words
A RESINOUS COMPOSITION HAVING INCREASED COLOR STABILITY TO HEAT 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 ALKYL GROUP 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 SUBTITUTED METHYLSTYRENE, NUCLEAR SUBSTITUTED DIMETHYLSTYRENE, NUCLEAR SUBSTITUTED ETHYLSTYRENE, NUCLEAR SUBSTITUTED DIETHYLSTYRENE AND MONO- AND DI-CHLOROSTYRENE, AND DISPERSED THEREIN FROM ABOUT 0.005% TO ABOUT 5% BY WEIGHT BASED ON THE TOTAL WEIGHT OF A COLOR STABILIZER SELECTED FROM THE GROUP CONSISTING OF A COMPOUND REPRESENTED BY THE GENERAL FORMULA
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) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |