US3366614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of alkali metal alcoholates of natural and synthetic polyhydroxy polymers and their derivatives
Assignee: State of Israel
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Filing: 1964-06-03
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Granted: 1968-01-30
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Expires: 1984-06-03
Abstract
No abstract record available.
Inventors
- 👤 Zilkha Albert
- 👤 Avny Yair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:02
CPC Classifications
C; C08; C08B; C08B37/00; C08B1/00; C08B1/08; C08B11/00; C08B11/02; C08B11/04; C08B11/08; C08B11/20; C08B15/00; C08B3/00; C08B3/22; C08B31/00; C08F; C08F8/00; C08F8/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
METHOD FOR THE PREPARATION OF AN ANIONICALLY GRAFTABLE ALKALI METAL ALCOHOLATE DERIVATIVE OF A HYDROXYL GROUP CONTAINING POLYMER SELECTED FROM THE GROUP CONSISTING OF STARCH, CELLULOSE, A CELLULOSE ESTER, A CELLULOSE ETHER, POLYVINYL ALCOHOL, PARTIALLY HYDROLYZED POLYVINYL ACETATE AND A POLYVINYL ACETAL COMPRISING THE STEPS OF DISPERSING SAID POLYMER IN AN APROTIC SOLVENT AND CONTACTING SAID DISPERSED POLYMER WITH AN ADDITION COMPOUND OF AN ALKALI METAL WITH A POLYCYCLIC AROMATIC HYDROCARBON.
Claim 2
Dependent Claim
71 words
METHOD FOR THE PREPARATION OF AN ANIONICALLY GRAFTABLE ALKALI METAL ALCOHOLATE DERIVATIVE OF A HYDROXYL GROUP CONTAINING POLYMER SELECTED FROM THE GROUP CONSISTING OF STARCH, CELLULOSE, A CELLULOSE ESTER, A CELLULOSE ETHER, POLYVINYL ALCOHOL, PARTIALLY HYDROLYZED POLYVINYL ACETATE AND A POLYVINYL ACETAL COMPRISING THE STEPS OF DISPERSING SAID POLYMER IN AN APROTIC SOLVENT AND CONTACTING SAID DISPERSED POLYMER WITH AN ADDITION COMPOUND OF AN ALKALI METAL WITH A POLYCYCLIC AROMATIC HYDROCARBON.
References Cited (Backward Citations)
US2183847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-29 | 1971-07-31 | 1972-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-29 | 1975-07-31 | 1976-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-29 | 1979-07-31 | 1980-01-30 | $7700.00 | Window Closed / Lapsed |