US3665036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dye forming nitroparaphenylenediamine sulfonyl derivatives
Assignee: L'Oréal SA
•
Filing: 1970-02-09
•
Granted: 1972-05-23
•
Expires: 1990-02-09
Abstract
Abstract Intermediate compounds which can be used to form hair dyes which have the formula: IN WHICH R1 and R2 are H, alkyl or hydroxyalkyl and may form a heterocyclic ring with the N atom, R3 is H, alkyl or hydroxyalkyl, R4 is H or CH3 and n is 2-6.
Inventors
- 👤 Gregoire Kalopissis
- 👤 Andree Bugaut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:28
CPC Classifications
C; C09; C09B; C09B51/00; A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/418; A61Q; A61Q5/00; A61Q5/06; A61Q5/065; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C07D295/00; C07D295/04; C07D295/12; C07D295/125; C07D295/13
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
13 words
A compound of claim 1, in which said compound has the Formula III.
Claim 2
Dependent Claim
15 words
A compound of claim 2, in which R1, R2 , R3 and R4 are H.
Claim 3
Dependent Claim
13 words
A compound of claim 1, in which said compound has the Formula IV.
Claim 4
Dependent Claim
13 words
A compound of claim 4, in which R1, R2 and R4 are H.
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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |