Patent US2900370A successfully refreshed from Google Patents.
US2900370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymerization of vinyl aryl sulfonates in the presence of glycols
Assignee: EIDP Inc
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Filing: 1954-12-03
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Granted: 1959-08-18
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Expires: 1974-12-03
Abstract
No abstract record available.
Inventors
- 👤 Wilkinson William Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:13
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44; C08F220/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A HOMOGENEOUS SINGLE-PHASE MONOMER BLEND COMPRISING AT LEAST ABOUT 85% ACRYLONIRILE, UP TO ABOUT 5% OF A WATER-SOLUBLE SALT OF A VINYL ARENE SULFONIC ACID, AND, AS A SOLUBILIZING AGENT THEREFOR, A GLYCOL HAVING A MOLECULAR WEIGHT LESS THAN ABOUT 7500, SAID BLEND BEING ONEWHICH FORMS TWO PHASES IN THE ABSENCE OF THE SAID GLYCOL.
Claim 2
Dependent Claim
55 words
A HOMOGENEOUS SINGLE-PHASE MONOMER BLEND COMPRISING AT LEAST ABOUT 85% ACRYLONIRILE, UP TO ABOUT 5% OF A WATER-SOLUBLE SALT OF A VINYL ARENE SULFONIC ACID, AND, AS A SOLUBILIZING AGENT THEREFOR, A GLYCOL HAVING A MOLECULAR WEIGHT LESS THAN ABOUT 7500, SAID BLEND BEING ONEWHICH FORMS TWO PHASES IN THE ABSENCE OF THE SAID GLYCOL.
References Cited (Backward Citations)
US2595779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |