Patent US3773673A successfully refreshed from Google Patents.
US3773673A
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Bleaching composition
Assignee: Procter and Gamble Co
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Filing: 1972-11-20
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Granted: 1973-11-20
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Expires: 1992-11-20
Abstract
Abstract Bleaching compositions having mixtures of persulfate bleaching compounds and organic peroxy-compounds in proportions such that the weight ratio of available oxygen from the persulfate to that from the organic peroxy compounds is up to 3:1. The compositions are particularly useful for washing and bleaching at lower temperatures. The bleaching compositions can be employed with detergent compounds to provide bleaching and detergent compositions having from 0.1 to 3 percent available oxygen by weight. A method aspect of the invention comprises treating fibrous materials in aqueous solution with the mixture of bleaching agents of the invention at a concentration of from 1 to 100 parts per million by weight of available oxygen.
Inventors
- 👤 P Jenkins
- 👤 A Ritchie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:04
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3945; C11D3/3942; D; D06; D06L; D06L4/00; D06L4/10; D06L4/13; D06L4/15
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
14 words
The bleaching composition of claim 1 wherein the monopersulfate is an alkali metal monopersulfate.
Claim 2
Dependent Claim
27 words
The bleaching composition of claim 1 wherein the monopersulfate consists essentially of a mixed salt of formula MHSO4, M2SO4 and 2MHSO5 wherein M is potassium or sodium.
Claim 3
Dependent Claim
22 words
The bleaching composition of claim 1 wherein the organic peroxy compound is perbenzoic acid or an alkali metal or ammonium salt thereof.
Claim 4
Dependent Claim
15 words
The bleaching composition of claim 1 wherein the organic peroxy compound is p-methoxy perbenzoic acid.
Claim 5
Dependent Claim
61 words
A bleaching and detergent composition consisting essentially of a water-soluble organic detergent; and the mixture of monopersulfate and organic peroxy-compound bleaching compounds of claim 1; the weight ratio of available oxygen derived from the monopersulfate to that derived from the peroxy compound being up to 3:1; the bleaching and detergent composition having from 0.1 to 3 percent available oxygen by weight.
Claim 6
Dependent Claim
25 words
The bleaching and detergent composition of claim 6 wherein there is also present an inorganic builder salt or organic sequestrant builder salt or mixtures thereof.
Claim 7
Dependent Claim
23 words
The bleaching and detergent composition of claim 7 wherein the available oxygen by weight of the composition ranges from 0.1 to 3 percent.
Claim 8
Dependent Claim
23 words
The bleaching and detergent composition of claim 8 wherein the available oxygen by weight of the composition ranges from 0.25 to 1 percent.
Claim 9
Dependent Claim
47 words
A method of bleaching fibrous materials which comprises treating them in an aqueous solution of the composition of claim 1, the concentration of said composition being such that there is present in the aqueous solution from 10 to 70 parts per million by weight of available oxygen.
Claim 10
Dependent Claim
17 words
The method of claim 10 wherein the bleaching solution has a pH of from 8.5 to 11.5.
Claim 11
Dependent Claim
14 words
The method of claim 11 wherein the pH value is from 9.5 to 10.5.
Claim 12
Dependent Claim
15 words
The method of claim 10 wherein the solution is at a temperature not exceeding 60*C.
Claim 13
Dependent Claim
19 words
The method of claim 13 wherein the solution is at a temperature within the range from 40*C to 55*C.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |