US4391723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled release laundry bleach product
Assignee: Procter and Gamble Co
•
Filing: 1981-07-13
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Granted: 1983-07-05
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Expires: 2001-07-13
Abstract
Abstract A hydrophilic or hydrotropic peroxyacid laundry bleach plus a surfactant bleach release-delaying agent, contained inside a pouch, bag or substrate, provides a controlled bleach release laundry product.
Inventors
- 👤 Dennis R. Bacon
- 👤 Frank P. Bossu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:24
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/04; C11D17/041; C11D17/046; C11D3/00; C11D3/39; C11D3/3945
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
99 words
A dry, granular laundry bleach product in a pouch comprising: I. a peroxyacid bleach selected from the group consisting of hydrotropic acid hydrophilic peroxyacid bleaches, II. an effective amount of a bleach release-delaying agent; said bleach and agent being contained within a closed water-insoluble but water-permeable pouch of fibrous material; said agent consisting of a surfactant selected from the group consisting of peroxyacid compatible synthetic detergents and short chain fatty acid soaps having carbon chain lengths of from about 8 to 14, whereby said agent delays the release of said peroxyacid bleach from said pouch into laundry wash liquor.
Claim 2
Dependent Claim
99 words
A dry, granular laundry bleach product in a pouch comprising: I. a peroxyacid bleach selected from the group consisting of hydrotropic acid hydrophilic peroxyacid bleaches, II. an effective amount of a bleach release-delaying agent; said bleach and agent being contained within a closed water-insoluble but water-permeable pouch of fibrous material; said agent consisting of a surfactant selected from the group consisting of peroxyacid compatible synthetic detergents and short chain fatty acid soaps having carbon chain lengths of from about 8 to 14, whereby said agent delays the release of said peroxyacid bleach from said pouch into laundry wash liquor.
Claim 3
Dependent Claim
26 words
The invention of claim 1 wherein said bleach release-delaying agent is present at a level of at least about 10% by weight of said peroxyacid bleach.
Claim 4
Dependent Claim
23 words
The invention of claim 1 wherein said peroxyacid is selected from the group consisting of: diperoxyphthalic, 1,12-diperoxydodecanedioic, 1,11-diperoxyundecanedioic, diperoxyazelaic, diperoxyadipic, and perbenzoic acids.
Claim 5
Dependent Claim
32 words
The invention of claim 2 wherein said bleach release-delaying agent is a surfactant selected from the group consisting of: sodium lauryl sulfate, sodium laurate, ethoxylated tallow alcohol and linear alkyl benzene sulfonate.
Claim 6
Dependent Claim
43 words
The invention of claim 1 wherein said pouch of fibrous material is: polyester fibers having a density of about 5-100 gm/m 2 and wherein said pouch material has a pore size such that there is substantially no leakage of the granular bleach product.
Claim 7
Dependent Claim
14 words
The invention of claim 5 wherein said density is about 40-65 gm/m 2 .
Claim 8
Dependent Claim
44 words
The invention of claim 1, 2, 3, 4, 5, or 6 wherein said bleach is 1,12-diperoxydodecanedioic acid and said agent is sodium lauryl sulfate wherein said agent is present at a level of from about 10% to about 60% by weight of said bleach.
Claim 9
Dependent Claim
43 words
The invention of claim 1, 2, 3, 4, 5, or 6 wherein said bleach is 1,12-diperoxydodecanedioic acid and said agent is sodium laurate wherein said agent is present at a level of from about 10% to about 60% by weight of said bleach.
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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) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |