US3882036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact lens cleaning and storing composition including nonionic surfactant, benzalkonium chloride and Na{hd 3{b EDTA
Assignee: Wesley Jessen Inc
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Filing: 1972-08-11
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Granted: 1975-05-06
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Expires: 1992-08-11
Abstract
Abstract A contact lens cleaning, storing and wetting solution is provided for cleaning, storing and wetting flexible silicone contact lenses. The solution comprises a poly(oxyethylene)poly(oxypropylene) block copolymer having a molecular weight between about 1,900 and 15,500, a water solubility in excess of about 10 grams per 100 ml., a cloud point in 1% aqueous solution above about 30*C., and a Foam Height in excess of 30 mm; a microbial growth inhibitor, such as benzalkonium chloride; purified water; and a sufficient amount of at least one essentially neutral, water-soluble compatible salt to provide a solution salt content equivalent to about 0.5 to 1.8% sodium chloride. The solution can also contain disodium or trisodium ethylenediamine tetraacetate and a polymeric viscosity building agent, if desired. A cleaning composition for polyhydroxylated alkyl methacrylate soft contact lenses includes the above poly (oxyethylene)poly(oxypropylene) block copolymer and sorbic acid as a germicidal ingredient.
Inventors
- 👤 Joseph Z Krezanoski
- 👤 John C Petricciani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:58
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/48; A; A61; A61L; A61L12/00; A61L12/08; A61L12/14; A61L12/141; A61L12/143; C11D1/00; C11D1/66; C11D1/722; C11D3/0005; C11D3/0078; C11D3/16; C11D3/37; C11D3/3703; C11D3/3707; G; G02; G02C; G02C13/00; G02C13/008; C11D1/008
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
61 words
A CLEANING AND STORAGE SOLUTION FOR HARD CONTACT LENSES CONSISTING ESSENTIALLY OF: FROM 0.002 TO 0.2% OF BENZALKONIUM CHLORIDE FOR INHIBITING MICROBIAL GROWTH IN THE SOLUTION; FROM 0.01 TO 2% TRISODIUM ETHYLENEDIAMINETETRAACETATE; FROM 0.1 TO 10% OF A PHISIOLOGICALLY-ACCEPTABLE NONIONIC SURFACTANT SELECTED FROM THE GROUP CONSISTING OF POLYOXYETHYLENE FATTY ACID ETHERS, POLYXYETHYLENE FATTY ACIDS ESTERS, AND POLYOXYPROPYLENE-POLYOXYETHYLENE BLOCK POLYMERS; AND WATER.
Claim 2
Dependent Claim
61 words
A CLEANING AND STORAGE SOLUTION FOR HARD CONTACT LENSES CONSISTING ESSENTIALLY OF: FROM 0.002 TO 0.2% OF BENZALKONIUM CHLORIDE FOR INHIBITING MICROBIAL GROWTH IN THE SOLUTION; FROM 0.01 TO 2% TRISODIUM ETHYLENEDIAMINETETRAACETATE; FROM 0.1 TO 10% OF A PHISIOLOGICALLY-ACCEPTABLE NONIONIC SURFACTANT SELECTED FROM THE GROUP CONSISTING OF POLYOXYETHYLENE FATTY ACID ETHERS, POLYXYETHYLENE FATTY ACIDS ESTERS, AND POLYOXYPROPYLENE-POLYOXYETHYLENE BLOCK POLYMERS; AND WATER.
Claim 3
Dependent Claim
18 words
The composition of claim 1 wherein the pH of the composition is from greater than 7 to 10.
Claim 4
Dependent Claim
24 words
The composition of claim 1 in which the nonionic surfactant is a polyoxypropylene-polyoxyethylene block polymer having a molecular weight of from 1,000 to 15,000.
Claim 5
Dependent Claim
12 words
The composition of claim 1 which contains 0.002 to 0.03% benzalkonium chloride.
Claim 6
Dependent Claim
61 words
A gel cleaning composition for hard contact lenses consisting essentially of: from 0.002 to 0.2% of benzalkonium chloride for inhibiting microbial growth in the solution; from 0.01 to 2% trisodium ethylenediaminetetraacetate; from about 18 to 60% of a physiologically-acceptable nonionic surfactant selected from the group consisting of polyoxyethylene fatty acid ethers, polyoxyethylene fatty acid esters, and polyoxypropylene-polyoxyethylene block polymers; and water.
Claim 7
Dependent Claim
61 words
A gel cleaning composition for hard contact lenses consisting essentially of: from 0.002 to 0.2% of benzalkonium chloride for inhibiting microbial growth in the solution; from 0.01 to 2% trisodium ethylenediaminetetraacetate; from about 18 to 60% of a physiologically-acceptable nonionic surfactant selected from the group consisting of polyoxyethylene fatty acid ethers, polyoxyethylene fatty acid esters, and polyoxypropylene-polyoxyethylene block polymers; and water.
Claim 8
Dependent Claim
24 words
The composition of claim 5 in which the nonionic surfactant is a polyoxypropylene-polyoxyethylene block polymer having a molecular weight of from 1,000 to 15,000.
Claim 9
Dependent Claim
22 words
The composition of claim 6 in which the concentration of nonionic surfactant is about 20 percent and the composition is a gel.
Claim 10
Dependent Claim
12 words
The composition of claim 5 which contains 0.002 to 0.03% benzalkonium chloride.
Claim 11
Dependent Claim
13 words
The composition of claim 8 which contains about 0.004 to 0.02% benzalkonium chloride.
Claim 12
Dependent Claim
18 words
The composition of claim 5 wherein the pH of the composition is from greater than 7 to 10.
Claim 13
Dependent Claim
33 words
A gel-form cleaning composition for hard contact lenses consisting essentially of 0.025% benzalkonium chloride; 0.25% trisodium ethylenediaminetetraacetate; 20% polyoxyethylene-polyoxypropylene block copolymer having a molecular weight of from 10,500 to 12,500; and purified waTer.
Claim 14
Dependent Claim
33 words
A gel-form cleaning composition for hard contact lenses consisting essentially of 0.025% benzalkonium chloride; 0.25% trisodium ethylenediaminetetraacetate; 20% polyoxyethylene-polyoxypropylene block copolymer having a molecular weight of from 10,500 to 12,500; and purified waTer.
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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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |