US3341483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anionic graft polymerization of vinyl monomers on natural polyhydroxy compounds, their derivatives and on synthetic polyhydroxy polymers
Assignee: Yissum Research Development Co of Hebrew University of Jerusalem
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Filing: 1962-07-26
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Granted: 1967-09-12
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Expires: 1982-07-26
Abstract
No abstract record available.
Inventors
- 👤 Zilkha Albert
- 👤 Bar-Nun Akiva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:41
CPC Classifications
C; C08; C08F; C08F261/00; C08F261/02; C08F261/04; C08F251/00; C08F291/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS FOR PREPARING GRAFT COPOLYMERS, WHICH COMPRISES REACTING ETHYLENICALLY UNSATURATED MONOMERS UNDER ANHYDROUS CONDITIONS WITH AN ALKALI METAL OR ALKALINE EARTH METAL ALKOXIDE DERIVATIVE OF A MEMBER OF THE GROUP CONSISTING OF CELLULOSE, HYDROXYETHYL CELLULOSE, HYDROXYPROPYL CELLULOSE, CELLULOSE CETATE, CELLULOSE PROPIONATE, CELLULOSE ACETATE-BUTYATE, CELLULOSE NITRATE, METHYL CELLULOSE, ETHYL CELLULOSE, STARCH, LIGNIN, DEXTRIN POLYSACCHARIDES, POLYVINYL ALCOHOL, POLYVINYL ACETATE, POLYVINYL BUTYRAL AND POLYVINYL FORMAL.
Claim 2
Dependent Claim
63 words
A PROCESS FOR PREPARING GRAFT COPOLYMERS, WHICH COMPRISES REACTING ETHYLENICALLY UNSATURATED MONOMERS UNDER ANHYDROUS CONDITIONS WITH AN ALKALI METAL OR ALKALINE EARTH METAL ALKOXIDE DERIVATIVE OF A MEMBER OF THE GROUP CONSISTING OF CELLULOSE, HYDROXYETHYL CELLULOSE, HYDROXYPROPYL CELLULOSE, CELLULOSE CETATE, CELLULOSE PROPIONATE, CELLULOSE ACETATE-BUTYATE, CELLULOSE NITRATE, METHYL CELLULOSE, ETHYL CELLULOSE, STARCH, LIGNIN, DEXTRIN POLYSACCHARIDES, POLYVINYL ALCOHOL, POLYVINYL ACETATE, POLYVINYL BUTYRAL AND POLYVINYL FORMAL.
References Cited (Backward Citations)
GB592210A
Cited
US2994634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |