US3752649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dye levelling on and oligomer removal from polyester fibers and cellulose or polyamide blends with fatty acid diester of butanediol-ethylene oxide condensate
Assignee: Hoechst AG
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Filing: 1971-11-17
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Granted: 1973-08-14
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Expires: 1991-11-17
Abstract
Abstract IN WHICH R1-CO- AND R2-CO- ARE RADICALS OF STRAIGHT CHAIN OR BRANCHED ALKANE- OR ALKENE-MONOCARBOXYLIC ACIDS HAVING 12 TO 22 CARBON ATOMS, AND N AND M EACH REPRESENT NUMBERS FROM 4 TO 12, OR DYEINGS PRODUCED WITHOUT USING THIS AUXLIARY AGENT ARE AFTERTREATED THEREWITH AND/OR THIS AUXILIARY AGENT IS ADDED AFTER THE DYEING IN THE FOLLOWING REDUCING CLEANING PROCESS. -O-(C2H4O)M-CO-R2 R1-CO-(OC2H4)N-O-C4H8 PROCESS FOR THE MANUFACTURE OF LEVEL DYEINGS ON FIRBOUS MATERIALS OF LINEAR POLYESTERS AND MIXTURES THEREOF WITH CELLULOSE- OR NITROGEN-CONTAINING FIBERS, WHEREIN THE DYEINGS ARE CARRIED OUT IN THE PRESENCE OF COMPOUNDS OF THE GENERAL FORMULA
Inventors
- 👤 O Smerz
- 👤 G Weckler
- 👤 A Scharf
- 👤 W Linke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:09
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/60; D06P1/613; D06P1/6131; D06P1/6133; D06P3/00; D06P3/34; D06P3/52; D06P3/54; D06P3/82; D06P3/8204; D06P3/8223; Y; Y10; Y10S; Y10S8/00; Y10S8/907
Claims Analysis
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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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |