Patent US3743678A successfully refreshed from Google Patents.
US3743678A
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US
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Hair dyeing compositions
Assignee: P&G Hair Care Holding Inc
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Filing: 1968-02-28
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Granted: 1973-07-03
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Expires: 1988-02-28
Abstract
Abstract COMPOUNDS OF THE FOLLOWING FORMULAE WHICH ARE USEFUL IN HAIR DYEING COMPOSITIONS ARE DISCLOSED: (4-NH2,2-(O2N-)PHENYL)-NH-(CH2)N-O-R1, (2-(O2N-),4-(R3- N(-R2)-)PHENYL)-NH-(CH2)N-O-R1, AND (4-(O2N-),2-NH2- PHENYL)-NH-(CH2)N-O-R1 WHEREIN N IS A WHOLE NUMBER OF 1 TO 4, R1 IS ALKYL OF 1 TO 8 CARBON ATOMS AND R2 AND R3 ARE HYDROXYALKYL OF UP TO 8 CARBON ATOMS.
Inventors
- 👤 A Halasz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:28
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/418; A61Q; A61Q5/00; A61Q5/10; C; C07; C07C; C07C271/00; C07C271/06; C07C271/08; C07C271/10; C07C271/20; C07C273/00; C07C273/18; C07C273/1854; C07C335/00; C07C335/04; C07C335/06; C07C335/08
Claims Analysis
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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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |