US2587465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solution polymerization of acrylonitrile polymers in aqueous alcohol mixtures
Assignee: Monsanto Chemicals Ltd
•
Filing: 1948-10-26
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Granted: 1952-02-26
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Expires: 1968-10-26
Abstract
No abstract record available.
Inventors
- 👤 George E Ham
- 👤 Earl C Chapin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:12
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/44; C08F2/00; C08F2/12; C08F2/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A METHOD OF PREPARING ACRYLONITRILE POLYMERS OF A MONOMERIC COMPOSITION OF WHICH AT LEAST 70 PER CENT OF THE MONOMER CONTENT IS ACRYLONITRILE, WHICH COMPRISES DISSOLVING THE MONOMERS IN A MIXTURE OF 20 TO 98 PER CENT WATER AND TWO TO 80 PER CENT OF A COMPOUND HAVING THE STRUCTURAL FORMULA
Claim 2
Independent Claim
51 words
A METHOD OF PREPARING ACRYLONITRILE POLYMERS OF A MONOMERIC COMPOSITION OF WHICH AT LEAST 70 PER CENT OF THE MONOMER CONTENT IS ACRYLONITRILE, WHICH COMPRISES DISSOLVING THE MONOMERS IN A MIXTURE OF 20 TO 98 PER CENT WATER AND TWO TO 80 PER CENT OF A COMPOUND HAVING THE STRUCTURAL FORMULA
References Cited (Backward Citations)
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US2456360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |