← Back to Patent Explorer
US4248928A Expired / Lapsed US ⏱️ 0.0 years remaining

Laundry additive product

Assignee: Procter and Gamble Co
•
Filing: 1979-06-04
•
Granted: 1981-02-03
•
Expires: 1999-06-04
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Additive products for use in the washing of textiles are provided comprising an organic peroxy bleach precursor on a non particulate solid substrate that can be added to conventional inorganic persalt containing detergent liquors to enhance their bleaching performance particularly at temperatures of 70 DEG C. and below.

Inventors

  • 👤 Gianfranco L. Spadini
  • 👤 Ian D. Tolliday

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 09:46
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/04; C11D17/041; C11D17/046; C11D3/00; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3935; D; D06; D06L; D06L4/00; D06L4/10; D06L4/15; C11D2111/00; C11D2111/10; C11D2111/12; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/24314; Y10T428/24322; Y10T442/00; Y10T442/20; Y10T442/2279; Y10T442/2295; Y10T442/2582

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 241 words
A product, adapted to remove stains from textiles in an aqueous inorganic peroxy bleach containing wash liquor, consisting essentially of (a) a flexible sheet substrate in water-releasable combination with (b) an organic peroxy bleach precursor capable of reacting in aqueous washing liquor with inorganic peroxy bleach selected from the group consisting of alkali meal perborate, percarbonate, persilicate and perpyrophosphate bleaches to form an organic peroxy bleach having a bleaching performance at least equivalent to that of the inorganic peroxy bleach, said precursor having a melting point ranging from about 95° C. to about 250° C. and being selected from the group consisting of tetra acetyl alkylene diamines in which the alkylene group has 2-4 carbon atoms, tetra acetyl glycouril and mixtures thereof; (c) a solid release aid in combination with said precursor functioning to provide a composition on the substrate with a melting point ranging from about 40° C. to about 80° C., said release aid comprising composition selected from the group consisting of water soluble and water dispersible C 12 -C 18 fatty carboxylic acids, polyethylene glycols of molecular weight greater than 4000 and mixtures of the foregoing; the weight ratio of the precursor to the substrate lying in the range from about 10:1 to about 1:10; the weight of the ratio of the precursor to the release aid lying in the range from about 20:1 to about 1:10; the maximum weight ratio of release aid to substrate being 10:1.
Claim 2
Dependent Claim 241 words
A product, adapted to remove stains from textiles in an aqueous inorganic peroxy bleach containing wash liquor, consisting essentially of (a) a flexible sheet substrate in water-releasable combination with (b) an organic peroxy bleach precursor capable of reacting in aqueous washing liquor with inorganic peroxy bleach selected from the group consisting of alkali meal perborate, percarbonate, persilicate and perpyrophosphate bleaches to form an organic peroxy bleach having a bleaching performance at least equivalent to that of the inorganic peroxy bleach, said precursor having a melting point ranging from about 95° C. to about 250° C. and being selected from the group consisting of tetra acetyl alkylene diamines in which the alkylene group has 2-4 carbon atoms, tetra acetyl glycouril and mixtures thereof; (c) a solid release aid in combination with said precursor functioning to provide a composition on the substrate with a melting point ranging from about 40° C. to about 80° C., said release aid comprising composition selected from the group consisting of water soluble and water dispersible C 12 -C 18 fatty carboxylic acids, polyethylene glycols of molecular weight greater than 4000 and mixtures of the foregoing; the weight ratio of the precursor to the substrate lying in the range from about 10:1 to about 1:10; the weight of the ratio of the precursor to the release aid lying in the range from about 20:1 to about 1:10; the maximum weight ratio of release aid to substrate being 10:1.
Claim 3
Dependent Claim 43 words
A product as recited in claim 1, in which the precursor to substrate weight ratio lies within the range from about 8:1 to about 1:2 and the precursor to release aid weight ratio lies in the range from about 20:1 to about 1:3.
Claim 4
Dependent Claim 21 words
A product as recited in claim 2, in which the substrate is a non-woven fibrous sheet bonded with a water-insoluble binder.
Claim 5
Dependent Claim 33 words
A product as recited in claim 3 in which the precursor is tetra acetyl ethylene diamine and in which the ratio of precursor to release aid ranges from about 4:1 to about 1:1.

References Cited (Backward Citations)

GB836108A Cited
US2955905A Cited
US3185649A Cited
US3532634A Cited
US3639248A Cited
US3686025A Cited
US3694364A Cited
US3955920A Cited
US3925234A Cited
US3944694A Cited
US3956556A Cited
US3945936A Cited
FR2299447B1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-02-03 1984-08-04 1985-02-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-02-03 1988-08-04 1989-02-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-02-03 1992-08-04 1993-02-03 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag