Patent US3218283A successfully refreshed from Google Patents.
US3218283A
Expired / Lapsed
US
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Novel solutions of poly-(acrylic anhydride) and poly-(methacrylic anhydride) polymers
Assignee: Monsanto Co
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Filing: 1962-07-26
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Granted: 1965-11-16
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Expires: 1982-07-26
Abstract
No abstract record available.
Inventors
- 👤 Wesley L Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:49
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08F; C08F8/00; C08F8/48; C08J2333/00; C08J2333/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A SPINNING SOLUTION COMPRISING (A) A CROSS-LINKED POLYMER WHICH IS DIFFICULTY SOLUBLE IN POLAR ORGANIC SOLVENTS, SAID POLYMER BEING SELECTED FROM THE GROUP CONSISTING OF PPOLY-(ACRYLIC ANHYDRIDE) AND POLY-(METHACRYLIC ANHYDRIDE), (B) A SOLVENT SELECTED FROM THE GROP CONSISTING OF DIMETHYLFORMAMIDE, DIMETHYLACETYLAMIDE, DIALKYL SULFOXIDES, ALIPHATIC SULFONES, LOWER ALIPHATIC NITRILES, LOWER ALIPHATIC DINITRILES, LACTONES AND N-ALKYL PYRROLIDONONES, (C) AND A SOLVENT ADJUVANT SELECTED FROM THE GOUP CONSISTING OF BIURET, UREA, LOWER ALKYL UREAS, THIOUREAS, FORMAMIDE, ACETYLUREA, THIOAMIDES AND AMINES HAVING AN IONIZATION CONSTANT OF FROM 1X10-3 TO 1X10**-4, SAID SOLVENT ADJUVANT BEING PRESENT IN A QUANTITY SUFFICIENT TO ENHANCE THE SOLUBILITY OF SAID POLYMER IN SAID SOLVENT.
Claim 2
Dependent Claim
105 words
A SPINNING SOLUTION COMPRISING (A) A CROSS-LINKED POLYMER WHICH IS DIFFICULTY SOLUBLE IN POLAR ORGANIC SOLVENTS, SAID POLYMER BEING SELECTED FROM THE GROUP CONSISTING OF PPOLY-(ACRYLIC ANHYDRIDE) AND POLY-(METHACRYLIC ANHYDRIDE), (B) A SOLVENT SELECTED FROM THE GROP CONSISTING OF DIMETHYLFORMAMIDE, DIMETHYLACETYLAMIDE, DIALKYL SULFOXIDES, ALIPHATIC SULFONES, LOWER ALIPHATIC NITRILES, LOWER ALIPHATIC DINITRILES, LACTONES AND N-ALKYL PYRROLIDONONES, (C) AND A SOLVENT ADJUVANT SELECTED FROM THE GOUP CONSISTING OF BIURET, UREA, LOWER ALKYL UREAS, THIOUREAS, FORMAMIDE, ACETYLUREA, THIOAMIDES AND AMINES HAVING AN IONIZATION CONSTANT OF FROM 1X10-3 TO 1X10**-4, SAID SOLVENT ADJUVANT BEING PRESENT IN A QUANTITY SUFFICIENT TO ENHANCE THE SOLUBILITY OF SAID POLYMER IN SAID SOLVENT.
References Cited (Backward Citations)
US2988541A
Cited
US3137660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |