Patent US2667475A successfully refreshed from Google Patents.
US2667475A
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Bleaching kebatinous materials
Assignee: —
•
Filing: —
•
Granted: 1954-01-26
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Expires: 1971-01-26
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:11
CPC Classifications
A; A61; A61K; A61K38/00; A61K38/01; A61K38/012; A61K38/014; A61K38/015; A61K8/00; A61K8/18; A61K8/19; A61K8/22; A61K8/23; A61K8/30; A61K8/64; A61K8/66; A61Q; A61Q19/00; A61Q3/00; A61Q5/00; A61Q5/08; C; C07; C07K; C07K14/00; C07K14/435; C07K14/46; C07K14/47; C07K14/4701; C07K14/4741
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A METHOD OF BLEACHING KERATINOUS MATERIALS WHICH COMPRISES INACTIVATING THE CATALASE CONTENT OF THE KERATINOUS MATERIAL AND THEREAFTER TREATING THE MATERIAL WITH AN AQUEOUS SOLUTION OF HYDROGEN PEROXIDE.
Claim 2
Independent Claim
28 words
A METHOD OF BLEACHING KERATINOUS MATERIALS WHICH COMPRISES INACTIVATING THE CATALASE CONTENT OF THE KERATINOUS MATERIAL AND THEREAFTER TREATING THE MATERIAL WITH AN AQUEOUS SOLUTION OF HYDROGEN PEROXIDE.
References Cited (Backward Citations)
US2454730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |