US3721575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous process for the preparation of modified starch dispersions
Assignee: Indopco Inc
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Filing: 1971-01-05
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Granted: 1973-03-20
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Expires: 1991-01-05
Abstract
Abstract TION AS, FOR EXAMPLE, WHEREIN THE PRODUCTS ARE ADDED DIRECTLY TO THE FURNISH OR PULP DURING PAPER MANUFACTURE. A PROCESS FOR PREPARING DISPERSIONS OF MODIFIED STARCHES CONTAINING CATIONIC GROUPS WHICH COMPRISES CONTINUOUSLY AND SIMULTANEOUSLY GELATINIZING AND REACTING A STARCH WITH A MONOFUNCTIONAL CATIONIGENIC REAGENT IN AN AQUEOUS REACTION MEDIUM HAVING A PH OF 8 OR HIGHER AT A TEMPERATURE OF AT LEAST 100*C. THE DERIVATIZED STARCH PRODUCTS ARE CONVENIENTLY UTILIZED AT THE SITE OF THEIR PREPARA-
Inventors
- 👤 W Jarowenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:52
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B31/125; C08B30/00; C08B30/12; C08B30/16; D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |