US3676205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Textile treatment with amphoteric starch
Assignee: Hubinger Co
•
Filing: 1970-02-13
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Granted: 1972-07-11
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Expires: 1990-02-13
Abstract
Abstract AMPHOTERIC STARCH WHICH CONTAINS BOTH CATIONIC AND ANIONIC GROUPS LINKED TO THE STARCH MOLECULE IS USED IN THE TEXTILE INDUSTRY, ESPECIALLY FOR SIZING MIXED FIBERS IN THE FORM OF THREADS OR YARNS SUCH AS, FOR EXAMPLE, MIXTURES OF POLYESTER FIBERS AND COTTON FIBERS. THE AMPHOTERIC STARCH HAS AN ISOELECTRIC PH AND CAN BE DYED WITH ACID DYES AT A PH BELOW THE ISOELECTRIC PH AND WITH BASIC DYES AT A PH ABOVE THE ISOELECTRIC PH. IT CAN THEREFORE BE USED TO ALTER THE DYEING PROPERTIES OF MATERIAL TO WHICH IT IS APPLIED.
Inventors
- 👤 Lee H Elizer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:29
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/01; D06M15/03; D06M15/11; C; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B31/125; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2402
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |