Patent US2837501A successfully refreshed from Google Patents.
US2837501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terpolymers including vinylarenesulfonic acids and acrylonitrile
Assignee: EIDP Inc
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Filing: 1953-08-03
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Granted: 1958-06-03
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Expires: 1973-08-03
Abstract
No abstract record available.
Inventors
- 👤 Millhiser Frederick Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:58
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44; C08F220/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A COMPOSITION OF MATTER COMPRISING A TERPOLYMER OF (1) ACRYLONITRILE IN A PREDOMINANT AMOUNT, (2) A COMPOUND SELECTED FROM THE CLASS CONSISTING OF VINYLARENESULFONIC ACIDS AND THEIR WATER-SOLUBLE SALTS IN MINOR AMOUNT AND (3) A DIFFERENT ETHYLENICALLY UNSATURATED MONOMER IN INTERMEDIATE AMOUNT COPOLYMERIZABLE THEREWITH.
Claim 2
Dependent Claim
44 words
A COMPOSITION OF MATTER COMPRISING A TERPOLYMER OF (1) ACRYLONITRILE IN A PREDOMINANT AMOUNT, (2) A COMPOUND SELECTED FROM THE CLASS CONSISTING OF VINYLARENESULFONIC ACIDS AND THEIR WATER-SOLUBLE SALTS IN MINOR AMOUNT AND (3) A DIFFERENT ETHYLENICALLY UNSATURATED MONOMER IN INTERMEDIATE AMOUNT COPOLYMERIZABLE THEREWITH.
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |