US3043648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the fast dyeing of natural and artificial polyamide fibers with water-soluble metal-containing azo dyestuffs
Assignee: Sandoz AG
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Filing: 1958-12-09
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Granted: 1962-07-10
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Expires: 1978-12-09
Abstract
No abstract record available.
Inventors
- 👤 Hemmi Hans Martin
- 👤 Peter Albin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:20
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/245; D06P1/00; D06P1/44; D06P1/60; D06P1/607; D06P1/6076; D06P3/14; D06P3/20; D06P5/00; D06P5/13; Y; Y10; Y10S; Y10S8/00; Y10S8/90; Y10S8/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS FOR THE FAST-DYEING OF FIBERS SELECTED FROM THE GROUP CONSISTING OF WOOL, SILK, NYLON AND PERLON IN THE WEAKLY ACID REGION WITH WATER-SOLUBLE, 1:2-METALCONTAINING AZO DYESTUFFS TO GIVE LEVEL AND FAST SHADES, WHICH COMPRISES DYEING THE SAID FIBERS IN AN AQUEOUS LIQUOR CONSISTING ESSENTIALLY OF (A) A MIXTURE OF (1) A BASIC WATER-SOLUBLE POLYGLYCOL ETHER, PRODUCED BY COMBINING ETHYLENE OXIDE WITH A POLYAMINE OF THE FORMULA
Claim 2
Dependent Claim
68 words
A PROCESS FOR THE FAST-DYEING OF FIBERS SELECTED FROM THE GROUP CONSISTING OF WOOL, SILK, NYLON AND PERLON IN THE WEAKLY ACID REGION WITH WATER-SOLUBLE, 1:2-METALCONTAINING AZO DYESTUFFS TO GIVE LEVEL AND FAST SHADES, WHICH COMPRISES DYEING THE SAID FIBERS IN AN AQUEOUS LIQUOR CONSISTING ESSENTIALLY OF (A) A MIXTURE OF (1) A BASIC WATER-SOLUBLE POLYGLYCOL ETHER, PRODUCED BY COMBINING ETHYLENE OXIDE WITH A POLYAMINE OF THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |