Patent US4374035A successfully refreshed from Google Patents.
US4374035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accelerated release laundry bleach product
Assignee: Procter and Gamble Co
•
Filing: 1981-07-13
•
Granted: 1983-02-15
•
Expires: 2001-07-13
Abstract
Abstract A hydrophilic or hydrotropic peroxyacid laundry bleach with surfactant plus an acid additive, contained inside a pouch, bag or substrate, provides an accelerated controlled bleach release laundry product.
Inventors
- 👤 Frank P. Bossu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:39
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/04; C11D17/041; C11D17/046; C11D3/00; C11D3/16; C11D3/20; C11D3/2075; C11D3/2082; C11D3/2086; C11D3/39; C11D3/3945; Y; Y10; Y10S; Y10S206/00; Y10S206/823
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
112 words
A dry, granular laundry bleach product in a pouch comprising: I. a peroxyacid bleach selected from the group consisting of the hydrotropic or hydrophilic peroxyacid bleaches, II. a surfactant at level of at least about 10% by weight of the peroxyacid bleach, said surfactant selected from the group consisting of peroxyacid compatible synthetic detergents and fatty acid soaps, and, III. a water-soluble, peroxyacid compatible acid additive, said acid having a pK a of from about 2 to about 7, said pouch consisting of a water-insoluble but water-permeable fibrous material; whereby said acid additive accelerates the release of said bleach from the pouch into laundry wash liquor in the presence of said surfactant.
Claim 2
Dependent Claim
112 words
A dry, granular laundry bleach product in a pouch comprising: I. a peroxyacid bleach selected from the group consisting of the hydrotropic or hydrophilic peroxyacid bleaches, II. a surfactant at level of at least about 10% by weight of the peroxyacid bleach, said surfactant selected from the group consisting of peroxyacid compatible synthetic detergents and fatty acid soaps, and, III. a water-soluble, peroxyacid compatible acid additive, said acid having a pK a of from about 2 to about 7, said pouch consisting of a water-insoluble but water-permeable fibrous material; whereby said acid additive accelerates the release of said bleach from the pouch into laundry wash liquor in the presence of said surfactant.
Claim 3
Dependent Claim
19 words
The invention of claim 1 wherein said acid additive has a pK a of about 3 to about 5.
Claim 4
Dependent Claim
29 words
The invention of claim 1 wherein said acid additive is selected from the group consisting of: benzoic acid, adipic acid, succinic acid, citric acid, tartaric acid, and glutaric acid.
Claim 5
Dependent Claim
35 words
The invention of claim 1 wherein said effective amount of said acid additive is at least about 10% by weight of the peroxyacid and wherein said laundry wash liquor maintains a pH of above 7.
Claim 6
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 7
Dependent Claim
28 words
The invention of claim 1 wherein said surfactant is selected from the group consisting of: sodium lauryl sulfate, sodium laurate, ethoxylated tallow alcohol and linear alkyl benzene sulfonate.
Claim 8
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 9
Dependent Claim
14 words
The invention of claim 7 wherein said density is about 40-65 gm/m 2 .
Claim 10
Dependent Claim
59 words
The invention of claim 1 wherein said bleach is 1,12-diperoxydodecanedioic acid and said surfactant is sodium lauryl sulfate, wherein said surfactant is present at a level of from about 10% to about 60% by weight of said bleach, and wherein said acid additive is present at a level of about 10% to about 60% by weight of said bleach.
Claim 11
Dependent Claim
59 words
The invention of claim 1 wherein said bleach is 1,12-diperoxydodecanedioic acid and said surfactant is sodium laurate and wherein said surfactant is present at a level of from about 10% to about 60% by weight of said bleach, and wherein said acid additive is present at a level of about 10% to about 60% by weight of said bleach.
Claim 12
Dependent Claim
57 words
The invention of claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 wherein said acid additive is adipic acid, and wherein said surfactant is present at a level of about 35-60% by weight of said bleach and wherein said acid additive is present at a level of about 15-30% by weight of said bleach.
References Cited (Backward Citations)
CA635620A
Cited
US3167513A
Cited
US3414593A
Cited
US4100095A
Cited
US4126573A
Cited
US4170565A
Cited
US4286016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |