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US3464778A
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Process for improving the dyeing of living human hair with anionic direct dyes
Assignee: Therachemie Chemische Therapeutische GmbH
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Filing: 1965-08-26
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Granted: 1969-09-02
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Expires: 1985-08-26
Abstract
No abstract record available.
Inventors
- 👤 Peter Berth
- 👤 Gunter Reese
- 👤 Karl-Josef Boosen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:09
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/06; A61Q5/065; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/33; A61K8/35; A61K8/40; A61K8/42; A61K8/49; A61K8/4906; A61K8/4926; A61K8/494; A61K8/4946; A61K8/4986; A61K2800/00; A61K2800/40; A61K2800/42; A61K2800/43; A61K2800/432
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2069215A
Cited
US2585610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |