US2794015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers
Assignee: EIDP Inc
•
Filing: 1953-11-03
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Granted: 1957-05-28
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Expires: 1973-11-03
Abstract
No abstract record available.
Inventors
- 👤 Harold L Jackson
- 👤 William K Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:40
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/44
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
59 words
A COPOLYMER CONTAINING AT LEAST 85%, BY WEIGHT, OF ACRYLONITRILE UNITS, AT LEAST 0.5%, BY WEIGHT, OF UNITS OF A POLYMERIZABLE WATER-SOLUBLE SULFONATE HAVING ETHYLENIC UNSATURATION IN THE ANION AND OF THE CLASS CONSISTING OF THE SULFONIC ACID AND SALTS THEREOF AND AT LEAST 0.5%, BY WEIGHT, OF A POLYMERIZABLE QUATERNARY AMMONIUM SALT HAVING ETHYLENIC UNSATURATION IN THE CATION.
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) | 1960-05-27 | 1960-11-26 | 1961-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-27 | 1964-11-26 | 1965-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-27 | 1968-11-26 | 1969-05-28 | $7700.00 | Window Closed / Lapsed |