US4994200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparations and processes for cleaning and disinfecting endoscopes
Assignee: Henkel AG and Co KGaA
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Filing: 1988-07-26
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Granted: 1991-02-19
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Expires: 2008-07-26
Abstract
Abstract In the cleaning and disinfection of endoscopes, the endoscope surfaces to be cleaned are successively (a) brought into contact with a cleaning solution which is heated to 55° to 65° C., kept at that temperature for 1 to 15 minutes and then drained off and which contains a low-foam nonionic surfactant, a proteolytic enzyme, at least one complexing agent and, optionally, other standard detergent constituents, and has a pH value of from 6 to 8; (b) brought into contact with a disinfectant solution which is heated to 55° to 65° C., kept at that temperature for 1 to 15 minutes and then separated off and which contains an aldehyde selected from the group consisting of formaldehyde and aliphatic C 2 -C 8 dialdehydes and at least one complexing agent, and has a pH value of from 6 to 8; (c) washed at least twice with water of which the pH value is adjusted to ph 6-8, the water being heated to 55° to 65° C. at least in the final wash cycle; and (d) dried with sterilized hot air at 55° to 65° C., water having a hardness of from 3° to 8° Gh being used in steps (a) to (c).
Inventors
- 👤 Karlheinz Disch
- 👤 Klaus Hachmann
- 👤 Klaus Bansemir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:22
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/48; A; A61; A61B; A61B1/00; A61B1/12; A61B1/121; A61L; A61L2/00; A61L2/16; A61L2/18; C11D3/16; C11D3/38; C11D3/386; C11D3/38618; C11D2111/00; C11D2111/40; C11D2111/44
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
161 words
An aqueous detergent concentrate comprising: from about 5 to about 10% by weight of at least one low-foam nonionic surfactant which is a polyethylene glycol ether corresponding to the following formula R.sup.1 --O--(CH.sub.2 CH.sub.2 O).sub.n --R.sup.2 (I) in which R 1 in a straight-chain or branched-chain C 8 -C 18 alkyl or alkenyl radical, R 2 is a straight-chain or branched-chain C 4 -C 8 alkyl radical and n is a number of from 7 to 12, from about 7.7 to about 77 AU/l of at least one proteolytic enzyme, from about 1 to about 5% by weight of at least one complexing agent, from about 10 to about 50% by weight of at least one enzyme stabilizer, from about 1 to about 5% by weight of at least one blending aid, and from about 0.05 to about 0.5% by weight of at least one preservative; and wherein the pH value of the concentrate is in the range of pH 4-6.
Claim 2
Dependent Claim
161 words
An aqueous detergent concentrate comprising: from about 5 to about 10% by weight of at least one low-foam nonionic surfactant which is a polyethylene glycol ether corresponding to the following formula R.sup.1 --O--(CH.sub.2 CH.sub.2 O).sub.n --R.sup.2 (I) in which R 1 in a straight-chain or branched-chain C 8 -C 18 alkyl or alkenyl radical, R 2 is a straight-chain or branched-chain C 4 -C 8 alkyl radical and n is a number of from 7 to 12, from about 7.7 to about 77 AU/l of at least one proteolytic enzyme, from about 1 to about 5% by weight of at least one complexing agent, from about 10 to about 50% by weight of at least one enzyme stabilizer, from about 1 to about 5% by weight of at least one blending aid, and from about 0.05 to about 0.5% by weight of at least one preservative; and wherein the pH value of the concentrate is in the range of pH 4-6.
Claim 3
Dependent Claim
63 words
The concentrate of claim 11 wherein in the polyethylene glycol ether corresponding to formula I, R 1 is a mixture of C 12 -C 18 alkyl radicals, a mixture of C 12 -C 18 alkenyl radicals emanating from a tallow fatty alcohol, R 2 is an n-butyl radical, and n is a number of from 9 to 10 or mixture of the foregoing.
Claim 4
Dependent Claim
42 words
The concentrate of claim 11 which contains as the complexing agent at least one of an alkali metal salt of nitrilotriacetic acid, ethylene-diamine tetraacetic acid, 1-hydroxyethane-1,1-diphosphonic acid, aminotris-(methylenephosphonic acid), ethylenediamine tetrakis-(methylenephosphonic acid), phosphonobutane tricarboxylic acid, tartaric acid, citric acid, or gluconic acid.
Claim 5
Dependent Claim
12 words
The concentrate of claim 3 wherein the complexing agent is sodium gluconate.
Claim 6
Dependent Claim
23 words
The concentrate of claim 1, wherein the enzyme stabilizer is at least one of triethanolamine, morpholine, a-pyrrolidone, ethylene glycol, propylene glycol, or glycerol.
Claim 7
Dependent Claim
16 words
The concentrate of claim 5 wherein the enzyme stabilizer is glycerol, propylene glycol or mixtures thereof.
Claim 8
Dependent Claim
13 words
The concentrate of claim 10 wherein the blending aid is sodium cumene sulfonate.
Claim 9
Dependent Claim
32 words
The concentrate of claim 1 wherein the preservative is one or more of p-hydroxybenzoic acid methyl ester, 5-bromo-5-nitro-1,3dioxane, glutaraldehyde, salicylic acid, 0-2-naphthyl-m-N-dimethyl thiocarbanilate, 5chloro-5-methyl-4-isothiazoline-3-one, 2-methyl-4-isothiazoline-3-one or a mixture of 5-chloro-5methyl-4-isothiazoline-3-one and 2-methyl-4isothiazoline-3-one.
Claim 10
Dependent Claim
13 words
The concentrate of claim 8 wherein the preservative is p-hydroxybenzoic acid methyl ester.
Claim 11
Dependent Claim
36 words
The concentrate of claim 1 wherein the blending aid is one or more of sodium cumene sulfonate, sodium toluene sulfonate, sodium xylene sulfonate, urea, a polyethylene glycol, a polypropylene glycol, methyl acetamide, or a fatty alcohol.
Claim 12
Dependent Claim
15 words
The concentrate of claim 1 wherein the at least one proteolytic enzyme is a protease.
Claim 13
Dependent Claim
115 words
The concentrate of claim 1 wherein the complexing agent is at least one of an alkali metal salt of nitrilotriacetic acid, ethylene-diamine tetra-acetic acid, 1-hydroxyethane-1,1-diphosphonic acid, aminotris-(methylenephosphonic acid), ethylenediamine tetrakis-(methylenephosphonic acid), phosphonobutane tricarboxylic acid, tartaric acid, citric acid, or gluconic acid, the enzyme stabilizer is at least one of triethanolamine, morpholine, a-pyrrolidone, ethylene glycol, propylene glycol, or glycerol, the blending aid is at least one of sodium cumene sulfonate, sodium toluene sulfonate, sodium xylene sulfonate, urea, a polyethylene glycol, a polypropylene glycol, methyl acetamide, or a fatty alcohol, and the preservative is at least one of p-hydroxybenzoic acid methyl ester, 5-bromo-5-nitro-1,3-dioxane, glutaraldehyde, salicylic acid, 0-2-naphthyl-m-N-dimethyl thiocarbanilate, 5-chloro-5-methyl-4-isothiazoline-3-one, 2-methyl-4-isothiazoline-3-one or a mixture of 5-chloro-5-methyl-4-isothiazoline-3-one and 2-methyl-4isothiazoline-3-one.
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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) | 1994-02-18 | 1994-08-20 | 1995-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-18 | 1998-08-20 | 1999-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-18 | 2002-08-20 | 2003-02-19 | $7700.00 | Window Closed / Lapsed |