US3168441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blue anthraquinone dye
Assignee: P&G Hair Care Holding Inc
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Filing: 1961-07-31
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Granted: 1965-02-02
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Expires: 1981-07-31
Abstract
No abstract record available.
Inventors
- 👤 Bil Milos Zdenek
- 👤 Walter H Brunner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:06
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/06; A61Q5/065; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/33; A61K8/35; A61K8/355; C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/28; C09B1/30; C09B1/303; D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/30; D06P3/3008; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
28 words
A PROCESS FOR DYEING HUMAN HAIR WHICH COMPRISES APPLYING THERETO A TINCTORIALLY EFFECTIVE QUANTITY OF AN AQUEOUS SOLUTION CONTAINING AN ANTHRAQUINONE WHICH IS REPRESENTED BY THE FOLLOWING FORMULA:
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) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |