US2529449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition comprising polymerized acrylonitrile and solvent therefor
Assignee: Monsanto Chemicals Ltd
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Filing: 1948-02-27
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Granted: 1950-11-07
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Expires: 1968-02-27
Abstract
No abstract record available.
Inventors
- 👤 George E Ham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:45
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J2333/00; C08J2333/18; C08J2333/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
127 words
A COMPOSITION SUITABLE FOR THE PREPARATION OF FIBERS BY EXTRUSION, WHICH COMPRISES A COMLETELY MISCIBLE MIXTURE OF FROM 5 TO 20 PERCENT BY WEIGHT OF A POLYMER OF AT LEAST 70 PERCENT OF ACRYLONITRILE AND UP TO 30 PERCENT OF ANOTHER COMPATIBLE OLEFINIC MONOMER AND FROM 80 TO 95 PERCENT OF A SOLVENT CONSISTING OF 30 TO 70 PERCENT BY WEIGHT OF DIMETHYL FORMAMIDE AND 70 TO 30 PERCENT OF A CYCLIC ETHER OF THE GROUP CONSISTING OF FIVE MEMBER RING COMPOUNDS AND SIX MEMBER RING COMPOUNDS, IN WHICH COMPOUNDS THE SAID MEMBERS ARE SELECTED FROM THE GROUP OF RADICALS CONSISTING OF -CH2-, -CHCH3-, -NH-, -CHC1, -S-, AND -O, AT LEAST THREE OF SAID MEMBERS BEING HYDROCARBON RADICALS AND AT LEAST ONE MEMBER BEING AN OXYGEN ATOM.
References Cited (Backward Citations)
US2404714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |