US2904385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing animal fibres and compositions therefor
Assignee: L'Oréal SA
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Filing: 1957-07-15
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Granted: 1959-09-15
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Expires: 1977-07-15
Abstract
No abstract record available.
Inventors
- 👤 Charle Roger
- 👤 Lantz Robert Lazare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:49
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/46; A61Q; A61Q5/00; A61Q5/06; A61Q5/065; C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/227; C09B43/00; C09B43/08; D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/14; D06P3/141; D06P3/30; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
58 words
PROCESS FOR DYEING ANIMAL FIBRES WHICH COMPRISES TREATING THE ANIMAL FIBRES WITH AN AQUEOUS SOLUTION AT PH 7 TO 11 CONTAINING AT LEAST ONE AZO DYE HAVING IN ITS MOLECULE AT LEAST ONE DISULPHIDE GROUP, AND A REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF LOWER ALIPHATIC MERCAPTO CARBOXYLIC ACIDS, ALKALI METAL HYDROSULPHITES, SULPHITES, BORO-HYDRIDES AND THIOUREA DIOXIDE.
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) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |