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US3925474A Expired / Lapsed US ⏱️ 0.0 years remaining

Nitroparaphenylene diamine derivatives and methods of making them

Assignee: L'Oréal SA
•
Filing: 1971-12-15
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Granted: 1975-12-09
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Expires: 1991-12-15
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Abstract

Abstract in which n is a whole number between two and six inclusive, while R2 and R3 represent H, a lower alkyl, or a lower hydroxyalkyl, and the alkyl portion of R R''''R1 R2 and R4 having 1 to 6 carbon atoms. Some of these derivatives are new compounds, and the invention includes new hair dyeing compositions comprising such compounds and the method of applying them to the hair. RADICAL IN WHICH R'' represents H, methyl, or NO2, or an OC-R'''' radical in which R'''' represents a lower alkyl; AND AT LEAST ONE OF R and Z is H; R1 represents a lower alkyl, lower hydroxyalkyl, lower alkoxyalkyl or IN WHICH: R represents H or a lower alkyl; Z represents H, an Methods of making nitroparaphenylene diamine derivatives responding to the formula:

Inventors

  • 👤 Gregoire Kalopissis
  • 👤 Andree Bugaut
  • 👤 Vahan Zorayan

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 04:59
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/418; A61Q; A61Q5/00; A61Q5/06; A61Q5/065

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 9 words
A METHOD FOR PREPARING A COMPOUND OF THE FORMULA
Claim 2
Independent Claim 9 words
A METHOD FOR PREPARING A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim 14 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A. A COMPOUND OF THE FORMULA
Claim 4
Dependent Claim 14 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A. A COMPOUND OF THE FORMULA
Claim 5
Dependent Claim 13 words
The compound of claim 2 which is 1-N- Beta -diethylaminoethylamino-2-nitro-4-(N''- Beta -diethylaminoethyl)-amino benzene.

References Cited (Backward Citations)

US3049393A Cited
US3665036A Cited
US3560136A Cited
US3578387A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-12-08 1979-06-09 1979-12-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-12-08 1983-06-09 1983-12-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-12-08 1987-06-09 1987-12-09 $7700.00 Window Closed / Lapsed

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