Patent US2903430A successfully refreshed from Google Patents.
US2903430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidizing and optical bleach
Assignee: Wyeth Holdings LLC
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Filing: 1954-04-27
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Granted: 1959-09-08
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Expires: 1974-04-27
Abstract
No abstract record available.
Inventors
- 👤 Butler Caroline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:26
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/60; D06L4/657; D06L4/10; D06L4/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A BLEACHING POWDER FOR WHITENING NATURAL AND SYNTHETIC PROTEIN FIBROUS MATERIAL WHICH COMPRISES A BLEACHING MIXTURE WHOSE ONLY ACTIVE CHEMICAL BLEACHING INGREDIENT IS ABOUT 30% BY WEIGHT OF THE MIXTURE SODIUM PERBORATE, THE SAID BLEACHING MIXTURE HAVING ADMIXED THEREIN FROM 0.01 TO 2.0% BY WEIGHT OF 4-METHYL-7-DIMETHYLAMINOCOURMARIN.
Claim 2
Dependent Claim
47 words
A BLEACHING POWDER FOR WHITENING NATURAL AND SYNTHETIC PROTEIN FIBROUS MATERIAL WHICH COMPRISES A BLEACHING MIXTURE WHOSE ONLY ACTIVE CHEMICAL BLEACHING INGREDIENT IS ABOUT 30% BY WEIGHT OF THE MIXTURE SODIUM PERBORATE, THE SAID BLEACHING MIXTURE HAVING ADMIXED THEREIN FROM 0.01 TO 2.0% BY WEIGHT OF 4-METHYL-7-DIMETHYLAMINOCOURMARIN.
References Cited (Backward Citations)
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Cited
US2610152A
Cited
US2706178A
Cited
US2654713A
Cited
US2791564A
Cited
US2692238A
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US2763618A
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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) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |