US3594355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble isothiuronium salts of epihalohydrin polymers
Assignee: Hercules LLC
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Filing: 1969-10-29
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Granted: 1971-07-20
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Expires: 1989-10-29
Abstract
Abstract WATER-SOLUBLE ISOTHIURONIUM SLATS OF EPIHALOHYDRIN HOMOPOLYMERS OR COPOLYMERS WITH ONE ANOTHER OR WITH ETHYLENE OXIDE ARE DESCRIBED WHICH ARE HIGHLY USEFUL AS SHRINKPROOFING AGENTS FOR WOOL, AS FLOCCULATING AGENTS AND AS PAPER ADDITIVES FOR INCREASING BOTH WET AND DRY STRNGTH. THESE ISOTHIURONIUM SALTS CAN BE PREPARED IN SOLUTION WHEREUPON ONLY ABOUT 5% OF THE HALO GROUPS NEED BE CONVERTED TO ISOTHIURONIUM GROUPS TO OBTAIN WATER-SOLUBILITY OF THE PRODUCT OR THEY CAN BE PREPARED IN THE SUBSTANTIAL ABSENCE OF A SOLVENT WHEREUPON ABOUT 50% OF THE HALO GROUPS NEED TO BE CONVERTED TO OBTAIN WATER-SOLUBILITY OF THE PRODUCT.
Inventors
- 👤 Edwin J Vandenberg
- 👤 William D Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:17
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/334; C08G65/3348; C08G65/321; C08G65/326
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |