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US2938882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl aromatic polymers stabilized with nu-methylaminoalkanols
Assignee: Dow Chemical Co
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Filing: 1956-07-02
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Granted: 1960-05-31
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Expires: 1976-07-02
Abstract
No abstract record available.
Inventors
- 👤 Jr William K Schweitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:42
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A COMPOSITION OF MATTER THE ESSENTIAL CONSTITUENTS OF WHICH ARE A VINYL AROMATIC POLYMER CONSISTING OF AT LEAST 70 PERCENT BY WEIGHT OF A MONOVINYL AROMATIC HY DROCARBON OF THE BENZENE SERIES HAVING THE VINYL RADICAL DIRECTLY ATTACHED TO A CARBON ATOM OF THE BENZENE NUCLEUS, AND NOT MORE THAN 30 PERCENT BY WEIGHT OF A MONOETHYLENICALLY UNSATURATED ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALPHA-METHYL STYRENE, ACRYLONITRILE AND METHYL METHACRYLATE, CHEMICALLY COMBINED IN THE POLYMER MOLECULE AND AS A STABILIZING AGENT THEREFOR, FROM 0.1 TO 5 PERCENT BASED ON THE WEIGHT OF THE POLYMER OF A TERTIARY AMINE SELECTED FROM THE GROUP CONSISTING OF 3-DIMETHYLAMINO-1,2-PROPANEDIOL AND THE MONO-AND DIMETHYL N-SUBSTITUTED ALKANOLAMINES CONTAINING FROM 2 TO 5 CARBON ATOMS IN THE ALKANOL RADICAL AND A SINGLE NITROGEN ATOM IN THE MOLECULE.
Claim 2
Dependent Claim
132 words
A COMPOSITION OF MATTER THE ESSENTIAL CONSTITUENTS OF WHICH ARE A VINYL AROMATIC POLYMER CONSISTING OF AT LEAST 70 PERCENT BY WEIGHT OF A MONOVINYL AROMATIC HY DROCARBON OF THE BENZENE SERIES HAVING THE VINYL RADICAL DIRECTLY ATTACHED TO A CARBON ATOM OF THE BENZENE NUCLEUS, AND NOT MORE THAN 30 PERCENT BY WEIGHT OF A MONOETHYLENICALLY UNSATURATED ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALPHA-METHYL STYRENE, ACRYLONITRILE AND METHYL METHACRYLATE, CHEMICALLY COMBINED IN THE POLYMER MOLECULE AND AS A STABILIZING AGENT THEREFOR, FROM 0.1 TO 5 PERCENT BASED ON THE WEIGHT OF THE POLYMER OF A TERTIARY AMINE SELECTED FROM THE GROUP CONSISTING OF 3-DIMETHYLAMINO-1,2-PROPANEDIOL AND THE MONO-AND DIMETHYL N-SUBSTITUTED ALKANOLAMINES CONTAINING FROM 2 TO 5 CARBON ATOMS IN THE ALKANOL RADICAL AND A SINGLE NITROGEN ATOM IN THE MOLECULE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |