Patent US5401327A successfully refreshed from Google Patents.
US5401327A
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Method of treating contact lenses
Assignee: Polymer Technology Corp
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Filing: 1993-06-18
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Granted: 1995-03-28
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Expires: 2013-06-18
Abstract
Abstract Methods of treating contact lenses employ a material composed of (a) a hydrophobic core having at least three carbon atoms and (b) at least three hydrophilic polyethylene oxide chains attached to the core.
Inventors
- 👤 Edward J. Ellis
- 👤 Jeanne Y. Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:27
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3788; A; A61; A61L; A61L12/00; A61L12/08; A61L12/14; A61L12/141; A61L12/143; C11D1/00; C11D1/38; C11D1/58; C11D1/66; C11D1/662; C11D1/72; C11D3/0005; C11D3/0078; C11D3/20; C11D3/22; C11D3/222; C11D3/227
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
71 words
A method of treating contact lenses which comprises contacting the lens with an aqueous solution comprising a material composed of (a) a hydrophobic core having at least three carbon atoms and (b) at least three hydrophilic polyethylene oxide chains attached to the core, and wherein said material is selected from the group consisting of an ethoxylated glucose derivative, an ethoxylated derivative of glycerin, an ethoxylated derivative of sorbitol, and mixtures thereof.
Claim 2
Independent Claim
71 words
A method of treating contact lenses which comprises contacting the lens with an aqueous solution comprising a material composed of (a) a hydrophobic core having at least three carbon atoms and (b) at least three hydrophilic polyethylene oxide chains attached to the core, and wherein said material is selected from the group consisting of an ethoxylated glucose derivative, an ethoxylated derivative of glycerin, an ethoxylated derivative of sorbitol, and mixtures thereof.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said material is an ethoxylated glucose derivative.
Claim 4
Dependent Claim
18 words
The method of claim 2 wherein the ethoxylated glucose derivative is a polyethylene glycol ether of methyl glucose.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein said material is an ethoxylated derivative of glycerin.
Claim 6
Dependent Claim
14 words
The method of claim 1 wherein said material is an ethoxylated derivative of sorbitol.
Claim 7
Dependent Claim
12 words
The method of claim 1 wherein the polyethylene oxide chains are hydroxy-terminated.
Claim 8
Dependent Claim
24 words
The method of claim 1 wherein the number of ethylene oxide groups in each chain is within the range from about 3 to 500.
Claim 9
Dependent Claim
19 words
The method of claim 1 wherein about 4 to about 10 polyethylene oxide chains are attached to the core.
Claim 10
Independent Claim
48 words
A method of treating contact lenses which comprises contacting the lens with an aqueous solution comprising: a material composed of (a) a hydrophobic core having at least three carbon atoms and (b) at least three hydrophilic polyethylene oxide chains attached to the core; and a cationic cellulosic polymer.
Claim 11
Independent Claim
48 words
A method of treating contact lenses which comprises contacting the lens with an aqueous solution comprising: a material composed of (a) a hydrophobic core having at least three carbon atoms and (b) at least three hydrophilic polyethylene oxide chains attached to the core; and a cationic cellulosic polymer.
Claim 12
Dependent Claim
13 words
The method of claim 9 wherein said material is an ethoxylated glucose derivative.
Claim 13
Dependent Claim
18 words
The method of claim 10 wherein the ethoxylated glucose derivative is a polyethylene glycol ether of methyl glucose.
Claim 14
Dependent Claim
30 words
The method of claim 9 wherein said material is a polyethylene oxide star molecule consisting essentially of a plurality of hydroxy-terminated polyethylene oxide chains attached to a divinyl benzene core.
Claim 15
Dependent Claim
14 words
The method of claim 9 wherein said material is an ethoxylated derivative of glycerin.
Claim 16
Dependent Claim
14 words
The method of claim 9 wherein said material is an ethoxylated derivative of sorbitol.
Claim 17
Dependent Claim
12 words
The method of claim 9 wherein the polyethylene oxide chains are hydroxy-terminated.
Claim 18
Dependent Claim
24 words
The method of claim 9 wherein the number of ethylene oxide groups in each chain is within the range from about 3 to 500.
Claim 19
Dependent Claim
19 words
The method of claim 9 wherein about 4 to about 10 polyethylene oxide chains are attached to the core.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1998-03-27 | 1998-09-26 | 1999-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-27 | 2002-09-26 | 2003-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-27 | 2006-09-26 | 2007-03-28 | $7700.00 | Window Closed / Lapsed |