US3826608A
Expired / Lapsed
US
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Process and composition for dyeing of human hair
Assignee: Therachemie Chemische Therapeutische GmbH
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Filing: 1970-09-24
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Granted: 1974-07-30
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Expires: 1990-09-24
Abstract
Abstract WHEREIN X AND Y ARE AMINO OR SUBSTITUTED AMINO GROUPS AND AQUEOUS DYESTUFF COMPOSITION CONTAINING SAID NITROPYRIDINES. (O2N-),X,Y-PYRIDINE A PROCESS FOR THE DYEING OF LIVING HUMAN HAIR CONSISTING ESSENTIALLY OF TREATING HUMAN HAIR AT A TEMPERATURE OF FROM ABOUT 10* C. TO40* C. WITH ANAQUEOUS SOLUTION CONTAINING A NITROPYRIDINE HAVING THE FORMULA
Inventors
- 👤 E Wiskott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:10
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C07D213/74; A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/49; A61K8/4906; A61K8/4926; A61Q; A61Q5/00; A61Q5/06; A61Q5/065
Claims Analysis
Total Claims: 0
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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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |