US3560480A
Expired / Lapsed
US
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Process for making anionic water-soluble polysaccharides
Assignee: Cartiera di Cairate SpA
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Filing: 1969-06-17
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Granted: 1971-02-02
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Expires: 1989-06-17
Abstract
Abstract A PROCESS FOR OBTAINING ANIONIC WATER SOLUBLE POLYSACCHARIDES BY INTRODUCING ACID GROUPS INTO THE POLYSACCHARIDES CHAIN IN AN ANHYDROUS SOLVENT IS DESCRIBED. THE DERIVATISED POLYSACCHARIDES HAVE GOOD FILM FORMING PROPERTIES AND CAN BE USED AS A ADDITIVES IN THE PAPER INDUSTRY.
Inventors
- 👤 Emilio Kruger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:39
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B37/00; C08B37/0006; C08B37/0057; D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |