Patent US4773939A successfully refreshed from Google Patents.
US4773939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of insoluble soil collectors for at least partial regeneration of laundering and cleaning solutions
Assignee: Henkel AG and Co KGaA
•
Filing: 1987-02-20
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Granted: 1988-09-27
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Expires: 2007-02-20
Abstract
Abstract The process of regenerating a soil-laden detergent solution comprising contacting said solution with a soil collector comprising a polyfunctional quaternary ammonium compound which is at least substantially insoluble in the solution and/or immobilized on a solid correspondingly insoluble in the solution.
Inventors
- 👤 Alfred Meffert
- 👤 Andreas Syldatk
- 👤 Brigitte Giesen
- 👤 Ingo Wegener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:01
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/04; C11D17/041; C11D17/046; C11D3/00; C11D3/0005; C11D3/0036; C11D3/16; C11D3/20; C11D3/22; C11D3/222; C11D3/227; C11D3/26; C11D3/30; C11D3/37; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/91
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
53 words
The process of regenerating a particulate soil-laden detergent solution comprising contacting said solution with a soil collector comprising a polyfunctional quaternary ammonium compound which is at least substantially insoluble in said solution and/or immobilized on a solid correspondingly insoluble in said solution, said soil collector being in the form of a finely-divided solid.
Claim 2
Dependent Claim
53 words
The process of regenerating a particulate soil-laden detergent solution comprising contacting said solution with a soil collector comprising a polyfunctional quaternary ammonium compound which is at least substantially insoluble in said solution and/or immobilized on a solid correspondingly insoluble in said solution, said soil collector being in the form of a finely-divided solid.
Claim 3
Dependent Claim
16 words
The process in accordance with claim 1 wherein said detergent solution comprises an aqueous, alkaline solution.
Claim 4
Dependent Claim
26 words
The process in accordance with claim 1 wherein said step of contacting said solution with said soil collector is performed during the use of said solution.
Claim 5
Dependent Claim
26 words
The process in accordance with claim 1 wherein said step of contacting said solution with said soil collector is performed after the use of said solution.
Claim 6
Dependent Claim
23 words
The process in accordance with claim 1 including the step of re-using said detergent solution after contacting said solution with said soil collector.
Claim 7
Dependent Claim
22 words
The process in accordance with claim 1 wherein said soil collector is in the form of a bed of said finely-divided solid.
Claim 8
Dependent Claim
29 words
The process in accordance with claim 1 wherein said polyfunctional quaternary ammonium compound is initially water-soluble and is chemically and/or physically fixed to the surface of a water-insoluble carrier.
Claim 9
Dependent Claim
25 words
The process in accordance with claim 1 wherein said polyfunctional quaternary ammonium compound is fixed to the surface of an organic and/or inorganic carrier material.
Claim 10
Dependent Claim
35 words
The process in accordance with claim 1 wherein said polyfunctional quaternary ammonium compound is fixed to the surface of an inorganic carrier material selected from the group consisting of aluminosilicates, finely-divided salts, oxides, and silicates.
Claim 11
Dependent Claim
35 words
The process in accordance with claim 1 wherein said polyfunctional quaternary ammonium compound is fixed to the surface of an organic carrier material selected from the group consisting of sawdust, straw and vegetable origin shavings.
Claim 12
Dependent Claim
31 words
The process in accordance with claim 1 wherein said polyfunctional quaternary ammonium compound comprises oligomeric and/or polymeric polyfunctional quaternary ammonium compounds having an average molecular weight of at least about 300.
Claim 13
Dependent Claim
30 words
The process in accordance with claim 1 including contacting said soil-laden detergent solution with an insoluble solid having a high absorption capacity for oleophilic soil such as oils and/or fats.
Claim 14
Dependent Claim
18 words
The process in accordance with claim 1 including contacting said soil-laden detergent solution with an insoluble polyanionic solid.
Claim 15
Dependent Claim
32 words
The process in accordance with claim 1 including contacting said soil-laden detergent solution with an insoluble polyanionic solid containing a plurality of anionic groups selected from salt-forming organic and/or inorganic acid groups.
Claim 16
Dependent Claim
17 words
The process in accordance with claim 1 wherein said polyfunctional quaternary ammonium compound comprises a polygalactomamman derivative.
Claim 17
Dependent Claim
39 words
The process in accordance with claim 15 wherein said polygalactomannan derivative comprises guarhydroxypropyl trimethylammonium chloride containing cationic groups corresponding to the formula CH.sub.2 CH(OH)CH.sub.2 N.sup.(+) (CH.sub.3).sub.3 Cl.sup.(-) attached to the oxygen atoms of the hydroxyl groups of the polysaccharide.
Claim 18
Dependent Claim
24 words
The process in accordance with claim 1 wherein said detergent solution contains surfactants selected from the group consisting of anionic surfactants and nonionic surfactants.
Claim 19
Dependent Claim
18 words
The process in accordance with claim 1 including pretreating said polyfunctional quaternary ammonium compound with an anionic surfactant.
Claim 20
Dependent Claim
25 words
The process in accordance with claim 18 wherein said polyfunctional quaternary ammonium compound is pretreated with at least a stolchlometric quantity of said anionic surfactant.
Claim 21
Dependent Claim
24 words
The process in accordance with claim 1 wherein said polyfunctional quaternary ammonium compound is fixed to finely divided, particulate cellulose and/or water-soluble cellulose derivatives.
Claim 22
Dependent Claim
33 words
The process in accordance with claim 1 wherein said polyfunctional quaternary ammonium compound is fixed to the surface of a polysaccharide carrier material and has an average degree of substitution not exceeding 0.5.
Claim 23
Dependent Claim
15 words
The process in accordance with claim 1 wherein said soil collector contains basic amino groups.
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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) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |