US3022288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing carboxylatevinyl and carboxyvinyl ethers of polysaccharides
Assignee: Monsanto Chemicals Ltd
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Filing: 1959-06-29
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Granted: 1962-02-20
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Expires: 1979-06-29
Abstract
No abstract record available.
Inventors
- 👤 Lee A Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:34
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/10; C08B11/12; C08B11/187; C08B31/00; C08B31/02; C08B31/04; C08B31/08; C08B31/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
THE METHOD OF PREPARING A CARBOXYLATEVINYL ESTER OF A POLYHYDROXY COMPOUND SELECTED FROM THE CONSISTING OF CELLULOSE, STARCHES AND HYDROXYETHYLATED STARCHES WHICH COMPRISES REACTING AN ALKALI METAL SALT OF THE POLYHYDROXY COMPOUND WITH AN ALKYL PROPIOLATE HAVING FROM 1 TO 6 CARBON ATOMS IN THE ALKYL RADICAL IN THE PRESENCE OF A SOLVENT FOR THE PROPIOLATE.
Claim 2
Independent Claim
56 words
THE METHOD OF PREPARING A CARBOXYLATEVINYL ESTER OF A POLYHYDROXY COMPOUND SELECTED FROM THE CONSISTING OF CELLULOSE, STARCHES AND HYDROXYETHYLATED STARCHES WHICH COMPRISES REACTING AN ALKALI METAL SALT OF THE POLYHYDROXY COMPOUND WITH AN ALKYL PROPIOLATE HAVING FROM 1 TO 6 CARBON ATOMS IN THE ALKYL RADICAL IN THE PRESENCE OF A SOLVENT FOR THE PROPIOLATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |