US2572561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of acrylonitrile and quaternary ammonium salts containing polymerizable allyl or methallyl substituents
Assignee: Monsanto Chemicals Ltd
•
Filing: 1949-10-25
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Granted: 1951-10-23
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Expires: 1969-10-25
Abstract
No abstract record available.
Inventors
- 👤 George E Ham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:54
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44; Y; Y10; Y10S; Y10S526/00; Y10S526/923
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A COPOLYMER OF 85 TO 99.5 PERCENT BY WEIGHT OF ACRYLONITRILE AND FROM 0.5 TO 15 PERCENT OF A COMPOUND HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
24 words
A COPOLYMER OF 85 TO 99.5 PERCENT BY WEIGHT OF ACRYLONITRILE AND FROM 0.5 TO 15 PERCENT OF A COMPOUND HAVING THE STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2138763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |