US3793310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amphoteric starch and preparation and uses therefor
Assignee: Hubinger Co
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Filing: 1972-11-24
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Granted: 1974-02-19
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Expires: 1992-11-24
Abstract
Abstract AMPHOTERIC STARCHES, ESPECIALLY HIGH AMYLOSE STARCHES, CONTAINING BASIC (CATIONIC) AND ACIDIC (ANIONIC) GROUPS, PREFERABLY TERTIARY AMINO, CYANAMIDE OR QUATERNARY AMINO (CATIONIC) AND SULFONIC ACID OR SULFONATE GROUPS OR CABOXYLIC OR CARBOXYLATE, OR PHOSPHATE OR PHOSPHONATE (ANIONIC), WITH OR WITHOUT NONIONIC GROUPS, E.G., HYDROXYALKYETHER, IN THE STARCH MOLECULE, ARE ESTERIFIED TO PRODUCE COMPOSITIONS WHICH ARE ESPECIALLY USEFUL FOR SIZING THREADS OR YARNS OF FIBERS SUCH AS, FOR EXAMPLE, MIXED COTTON FIBERS AND POLYESTER FIBERS, VIZ, POLYETHYLENE TEREPHTHALATE FIBERS, GLASS FIBERS, AND HYDROPHOBIC FIBERS THAT ARE DIFFICULT TO SIZE.
Inventors
- 👤 L Elizer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:35
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/16; D; D06; D06M; D06M15/00; D06M15/01; D06M15/03; D06M15/11; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/31504; Y10T428/31786; Y10T428/31971
Claims Analysis
Total Claims: 0
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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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |