US3912450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for synergistic disinfection or sterilization
Assignee: Wave Energy Systems Inc
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Filing: 1973-05-17
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Granted: 1975-10-14
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Expires: 1993-05-17
Abstract
Abstract A method for disinfecting or sterilizing medical, surgical, dental instruments or other objects in liquid phase with improved sporicidal compositions. The method is based upon the synergistic effects observed when combining nonionic and anionic surfactants with aqueous or alcoholic glutaraldehyde solutions. The method can be used also with ultrasonic irradiation over a wide frequency range (10 to 850 kHz). Two types of particularly effective synergistic sporicidal compositions are also described.
Inventors
- 👤 Raymond Marcel Gut Boucher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:21
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/48; A; A01; A01N; A01N35/00; A01N35/02; A61; A61L; A61L2/00; A61L2/02; A61L2/025; C11D1/00; C11D1/66; C11D1/72; C11D3/16; C11D3/20; C11D3/2072; C11D2111/00; C11D2111/40; C11D2111/46
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
78 words
A METHOD FOR DISINFECTING OR STERILIZING MEDICAL, DENTAL, SURGICAL INSTRUMENT OR OTHER OBJECTS IN LIQUID PHASE AT A TEMPERATURE OF AT LEAST 15$C COMPRISING CONTACTING SAID OBJECT WITHA SPORICIDAL COMPOSITION COMPRISING FROM ABOUT 0.1 PERCENT BY WEIGHT TO ABOUT 5 PERCENT BY WEIGHT OF GLUTARALDEHYDE AND FROM ABOUT 0.10 PERCENT BY WEIGHT TO ABOUT 1 PERCENT BY WEIGHT OF A NONIONIC SURFACE ACTIVE AGENT WHICH IS A MIXTURE OF ETHOXYLATES OF ISOMERIC LINEAR ALCHOLS HAVING THE FOLLOWING FORMULA:
Claim 2
Independent Claim
78 words
A METHOD FOR DISINFECTING OR STERILIZING MEDICAL, DENTAL, SURGICAL INSTRUMENT OR OTHER OBJECTS IN LIQUID PHASE AT A TEMPERATURE OF AT LEAST 15$C COMPRISING CONTACTING SAID OBJECT WITHA SPORICIDAL COMPOSITION COMPRISING FROM ABOUT 0.1 PERCENT BY WEIGHT TO ABOUT 5 PERCENT BY WEIGHT OF GLUTARALDEHYDE AND FROM ABOUT 0.10 PERCENT BY WEIGHT TO ABOUT 1 PERCENT BY WEIGHT OF A NONIONIC SURFACE ACTIVE AGENT WHICH IS A MIXTURE OF ETHOXYLATES OF ISOMERIC LINEAR ALCHOLS HAVING THE FOLLOWING FORMULA:
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein the nonionic surface active agent is partially replaced by an anionic alkyl aryl sulfonate.
Claim 4
Independent Claim
73 words
A METHOD OF DISINFECTING OR STERILIZING A CONTAMINATED OBJECT IN LIQUID PHASE AT A TEMPERATURE LEAST 15*C, COMPRISING CONTACTING SAID OBJECT WITH AN AQUEOUS SPORICIDAL SOLUTION COMPRISING FROM ABOUT 0.1 PERCENT BY WEIGHT TO ABOUT 5 PERCENT BY WEIGHT OF GLUTARALDEHYDE AND FROM ABOUT 0.31 PERCENT BY WEIGHT TO ABOUT 1 PERCENT BY WEIGHT OF A NONIONIC SURFACE ACTIVE WHICH IS A MIXTURE OF ETHOXYLATES OF ISOMERIC LINEAR ALCOHOLS HAVING THE FOLLOWING FORMULA:
Claim 5
Independent Claim
73 words
A METHOD OF DISINFECTING OR STERILIZING A CONTAMINATED OBJECT IN LIQUID PHASE AT A TEMPERATURE LEAST 15*C, COMPRISING CONTACTING SAID OBJECT WITH AN AQUEOUS SPORICIDAL SOLUTION COMPRISING FROM ABOUT 0.1 PERCENT BY WEIGHT TO ABOUT 5 PERCENT BY WEIGHT OF GLUTARALDEHYDE AND FROM ABOUT 0.31 PERCENT BY WEIGHT TO ABOUT 1 PERCENT BY WEIGHT OF A NONIONIC SURFACE ACTIVE WHICH IS A MIXTURE OF ETHOXYLATES OF ISOMERIC LINEAR ALCOHOLS HAVING THE FOLLOWING FORMULA:
Claim 6
Dependent Claim
21 words
The method of claim 3 wherein part of the nonionic surface active agent is replaced by an anionic alkyl aryl sulfonate.
Claim 7
Dependent Claim
17 words
The method of claim 3 wherein the pH of the aqueous solution is from 1 to 7.
Claim 8
Dependent Claim
24 words
The method of claim 3 wherein the aqueous solution is buffered by addition of alkaline salt to a pH of from 7 to 9.
Claim 9
Dependent Claim
32 words
The method of claim 3 wherein the object to be sterilized is contacted with the aqueous solution at a temperature of from 15* to 75*C for from 1 minute to 2 hours.
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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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |