Patent US3909438A successfully refreshed from Google Patents.
US3909438A
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Bleaching composition
Assignee: Kao Corp
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Filing: 1973-10-18
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Granted: 1975-09-30
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Expires: 1993-10-18
Abstract
Abstract A bleaching composition comprising an inorganic peroxide which releases hydrogen peroxide and a Beta -alkyllactone of the formula: wherein R represents H or alkyl of one to 12 carbon atoms.
Inventors
- 👤 Yunosuke Nakagawa
- 👤 Shori Hakozaki
- 👤 Koitsu Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:00
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3907; C11D3/391; D; D06; D06L; D06L4/00; D06L4/10; D06L4/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
21 words
A BLEACHING COMPOSITION COMPRISING AN INORGANIC PEROXIDE CAPABLE OF RELEASING HYDROGEN PEROXIDE IN AQUEOUS SOLUTION AND A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
21 words
A BLEACHING COMPOSITION COMPRISING AN INORGANIC PEROXIDE CAPABLE OF RELEASING HYDROGEN PEROXIDE IN AQUEOUS SOLUTION AND A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
32 words
A bleaching composition according to claim 1, in which the inorganic peroxide is selected from the group consisting of hydrogen peroxide, sodium perborate, sodium percarbonate, sodium peroxypyrophosphate, sodium peroxysilicate and sodium peroxytripolyphosphate.
Claim 4
Dependent Claim
18 words
A bleaching composition according to claim 2, in which R is alkyl of one to four carbon atoms.
Claim 5
Dependent Claim
12 words
A bleaching composition according to claim 2, in which R is H.
Claim 6
Dependent Claim
39 words
A bleaching composition in which the proportion of said compound to said inorganic peroxide is such that the molar ratio of hydrogen peroxide to said compound, in an aqueous solution of said bleaching composition is from 10:1 to 1:10.
Claim 7
Dependent Claim
39 words
A bleaching composition in which the proportion of said compound to said inorganic peroxide is such that the molar ratio of hydrogen peroxide to said compound, in an aqueous solution of said bleaching composition is from 10:1 to 1:10.
Claim 8
Dependent Claim
20 words
A bleaching composition according to claim 5 in which said proportion is such that said molar ratio is about 1:1.
Claim 9
Dependent Claim
28 words
An aqueous bleaching liquor comprising an aqueous solution of the bleaching composition of claim 1 and containing from about 0.001 to 3 wt. % of said inorganic peroxide.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |