US3681005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing wool in fibrous material containing wool with 1:2 metal complex azo dyes,acid and aromatic hydro-carbons,carboxylic acids/esters or phenols
Assignee: Hoechst AG
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Filing: 1969-08-12
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Granted: 1972-08-01
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Expires: 1989-08-12
Abstract
Abstract PROCESS FOR DYEING FIBROUS MATERIALS MADE OF OR CONSISTING OF WOOL WITH 1:2 COMPLEX METAL COMPOUNDS OF AZO DYESTUFFS INSOLUBLE OR SPARINGLY SOLUBLE IN WATER IN WHICH PROCESS A DYEBATH IS USED THAT CONTAINS, ADDITIONALLY TO SAID DYESTUFFS AND AN ACID, AUXILARIES KNOWN AS CARRIERS, SUCH AS AROMATIC HYDROCARBONS, AROMATIC HALOHYDROCARBONS, AROMATIC CARBOXYLIC ACIDS OR ESTERS THEREOF OR PHENOL DERIVATIVES. THE ADVANTAGE OF THE PROCESS OF THE PRESENT INVENTION IS ESPECIALLY TO BE SEEN IN THE FACT THAT EASILY OBTAINABLE DYESTUFFS CAN BE USED WITH GOOD COLOR YIELD FOR THE DYEING OF WOOL.
Inventors
- 👤 Hans-Ulrich Von Der Eltz
- 👤 Norbert Kollodzeiski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:44
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/82; D06P3/8204; D06P3/8214; D06P1/00; D06P1/44; D06P1/64; D06P1/651; D06P1/65106; D06P1/6515; D06P1/653; D06P3/02; D06P3/04; D06P3/14; D06P3/20; D06P3/34; D06P3/52; D06P3/54
Claims Analysis
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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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |