US4066399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for humidifying a gas sterilizer
Assignee: American Sterilizer Co
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Filing: 1975-09-26
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Granted: 1978-01-03
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Expires: 1995-09-26
Abstract
Abstract Humidifying composition is introduced into a portable gas sterilizer in droplet form. The composition is packaged in an aerosol can and comprises water, preferably water and organic solvent. Automatic controls effect a predetermined relative humidity in the sterilizer before initiating sterilizing gas introduction.
Inventors
- 👤 Donald A. Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:53
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/16; A61L2/20; A61L2/206; A61L2/22
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
In a gas sterilization process carried out in a sterilizing chamber and involving humidification of materials within the chamber and subsequently involving introduction of sterilizing gas, the steps comprising a. providing improved humidification by i. providing a combination of water and water soluble organic solvent whose presence increases vapor pressure, decreases surface tension and lowers polarity, said solvent being selected from the group consisting of lower alcohols, ketones and ethers; and ii. introducing such combination of water and organic solvent into the sterilizing chamber, the presence of the organic solvent improving the permeability of such combination through the pores of materials within such chamber; and b. subsequent to step (a), introducing into the sterilization chamber sterilizing gas comprising ethylene oxide.
Claim 2
Dependent Claim
120 words
In a gas sterilization process carried out in a sterilizing chamber and involving humidification of materials within the chamber and subsequently involving introduction of sterilizing gas, the steps comprising a. providing improved humidification by i. providing a combination of water and water soluble organic solvent whose presence increases vapor pressure, decreases surface tension and lowers polarity, said solvent being selected from the group consisting of lower alcohols, ketones and ethers; and ii. introducing such combination of water and organic solvent into the sterilizing chamber, the presence of the organic solvent improving the permeability of such combination through the pores of materials within such chamber; and b. subsequent to step (a), introducing into the sterilization chamber sterilizing gas comprising ethylene oxide.
Claim 3
Dependent Claim
19 words
Method as recited in claim 1 in which the combination is introduced into the sterilizing chamber in droplet form.
Claim 4
Dependent Claim
13 words
Method as recited in claim 1 in which the organic solvent is isopropanol.
Claim 5
Dependent Claim
13 words
Method as recited in claim 1 in which the organic solvent is n-butanol.
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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) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |