US4016090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable bleaching composition
Assignee: Kao Corp
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Filing: 1975-02-28
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Granted: 1977-04-05
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Expires: 1995-02-28
Abstract
Abstract A stable bleaching composition containing, as essential ingredients, an inorganic peroxide, an activating agent for said inorganic peroxide and potassium carbonate.
Inventors
- 👤 Yunosuke Nakagawa
- 👤 Koitsu Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:05
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/10; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3907; D; D06; D06L; D06L4/00; D06L4/10; D06L4/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
70 words
A dry, powder form, bleaching composition having an improved storage stability, consisting essentially of: from 5 to 90 percent by weight of sodium percarbonate; from one to 40 percent by weight of an activator for said sodium percarbonate and capable of increasing the bleaching effect of said sodium percarbonate in aqueous solution at a temperature below 80° C; and from 5 to 40 percent by weight of anhydrous potassium carbonate.
Claim 2
Dependent Claim
70 words
A dry, powder form, bleaching composition having an improved storage stability, consisting essentially of: from 5 to 90 percent by weight of sodium percarbonate; from one to 40 percent by weight of an activator for said sodium percarbonate and capable of increasing the bleaching effect of said sodium percarbonate in aqueous solution at a temperature below 80° C; and from 5 to 40 percent by weight of anhydrous potassium carbonate.
Claim 3
Dependent Claim
31 words
A bleaching composition according to claim 1 in which said activator is selected from the group consisting of acetic acid esters of polyhydric alcohols, tetraacetylethylenediamine, tetraacetylglycoluril, phthalic anhydride and succinic anhydride.
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) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |