Patent US3721700A successfully refreshed from Google Patents.
US3721700A
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Fluorinated polyglycol derivatives and their preparation
Assignee: Hoechst AG
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Filing: 1970-08-26
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Granted: 1973-03-20
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Expires: 1990-08-26
Abstract
Abstract ADDUCTS FROM FLUOROALKANOLS, TOLUENE DIISOCYANATES AND POLYETHYLENE GLYCOLS ARE USEFUL FOR RENDERING TEXTILES OIL-AND WATER REPELLENT AND ACHIEVE THE "SOIL RELEASE EFFECT." FURTHERMORE, THEY ARE DISPERSING AGENTS FOR OILAND WATER REPELLENT POLYMERS MADE OF ADDUCTS FROM SAID FLUOROALKANOLS, TOLUENE DIISOCYANATES AND EHTYLENE IMINE.
Inventors
- 👤 E Schuierer
- 👤 D Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:21
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/372; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4833; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/8083; C08G18/8087; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/333; C08G65/33348; C08G69/00; D06M13/395; D06M13/398; D06M15/00; D06M15/19; D06M15/37; D06M15/564; D06M15/576; D06M15/61
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) | 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 |