Patent US2750327A successfully refreshed from Google Patents.
US2750327A
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US
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Process of dyeing animal fibers and dyes and dyeing compositions therefor
Assignee: Lever Brothers Co
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Filing: 1954-05-28
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Granted: 1956-06-12
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Expires: 1974-05-28
Abstract
No abstract record available.
Inventors
- 👤 Eckardt Wolfgang Max Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:05
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/30; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A PROCESS OF DYEING ANIMAL FIBERS, IN PARTICULAR HUMAN HAIR, WHICH COMPRISES TREATING HAIR WITH AN AQUEOUS SOLUTION OF AT LEAST ONE ORGANIC DYE OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
28 words
A PROCESS OF DYEING ANIMAL FIBERS, IN PARTICULAR HUMAN HAIR, WHICH COMPRISES TREATING HAIR WITH AN AQUEOUS SOLUTION OF AT LEAST ONE ORGANIC DYE OF THE GENERAL 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) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |