Patent US4493783A successfully refreshed from Google Patents.
US4493783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning agent for optical surfaces
Assignee: Alcon Research LLC
•
Filing: 1983-02-28
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Granted: 1985-01-15
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Expires: 2003-02-28
Abstract
Abstract Soft and hard contact lenses are freed from deposits by rubbing them with a particulate organic polymer with a carrier, the polymer having a particular size in the range from about one micron to about 600 microns and a Rockwell hardness in the range of from about R120 to about M68, or a shore hardness in the range from about A15 to about D100.
Inventors
- 👤 Kai C. Su
- 👤 Leslie F. Stebbins
- 👤 Rajkumar P. Bhatia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:42
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0078; C11D17/00; C11D17/0008; C11D17/0013; C11D3/16; C11D3/37
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
105 words
An aqueous ophthalmic cleansing composition for cleaning a soft contact lens comprising an effective amount of a substantially spherical particulate polymer for removal of proteinaceous and lipid deposits on said soft contact lens, said particulate polymer selected from the group consisting of polyethylene, cellulose acetate butyrate, polycarbonate, poly 11-undecamide, polyvinyl chloride and mixtures thereof wherein said particulate polymers have a particle size in the range from about twenty microns to about one hundred microns, a carrier in which said particulate polymer is suspended, said carrier having a viscosity sufficient to keep the particulate polymer in suspension and a preservative, to provide an isotonic cleansing composition.
Claim 2
Dependent Claim
105 words
An aqueous ophthalmic cleansing composition for cleaning a soft contact lens comprising an effective amount of a substantially spherical particulate polymer for removal of proteinaceous and lipid deposits on said soft contact lens, said particulate polymer selected from the group consisting of polyethylene, cellulose acetate butyrate, polycarbonate, poly 11-undecamide, polyvinyl chloride and mixtures thereof wherein said particulate polymers have a particle size in the range from about twenty microns to about one hundred microns, a carrier in which said particulate polymer is suspended, said carrier having a viscosity sufficient to keep the particulate polymer in suspension and a preservative, to provide an isotonic cleansing composition.
Claim 3
Dependent Claim
27 words
A cleansing composition as recited in claim 1 wherein said particulate polymer is precipitated from solution, said precipation rendering the shape of said particles of said polymer.
Claim 4
Dependent Claim
50 words
A cleansing composition as recited in claim 2 wherein said carrier is compatible with ocular tissue and comprises a thickener wherein said thickener is selected from the group consisting of polyethylene glycol, carboxy vinyl polymers, cellulose, hydroxyethyl cellulose, methoxy cellulose, low molecular weight hydroxylethylmethacrylate, polyvinyl alcohol, polyvinylpyrrolidine and mixtures thereof.
Claim 5
Dependent Claim
15 words
A cleansing composition as recited in claim 2 wherein said particulate polymer is poly 11-undecamide.
Claim 6
Dependent Claim
14 words
A cleansing composition as recited in claim 2 wherein said composition includes sodium chloride.
Claim 7
Dependent Claim
15 words
A cleansing composition as recited in claim 5 wherein said particulate polymer is poly 11-undecamide.
Claim 8
Dependent Claim
23 words
An aqueous ophthalmic cleansing composition for cleaning a soft contact lens as recited in claim 1 wherein said particulate polymer is poly 11-undecamide.
Claim 9
Dependent Claim
25 words
A cleansing composition as recited in claim 1, wherein said particulate polymer comprises from about 5 to about 20 percent by weight of said composition.
Claim 10
Dependent Claim
15 words
A cleansing composition as recited in claim 8 wherein said particulate polymer is poly 11-undecamide.
Claim 11
Dependent Claim
102 words
An aqueous ophthalmic cleansing composition for cleaning a contact lens comprising an effective amount of a substantially spherical particulate polymer for the removal of proteinaceous and lipid deposits on said contact lens, said particulate polymer selected from the group consisting of polyethylene, cellulose acetate butyrate, polycarbonate, poly 11-undecamide, polyvinyl chloride and mixtures thereof wherein said particulate polymer has a particle size from about twenty microns to about one hundred microns, and a carrier in which said particulate polymer is suspended, said carrier having a viscosity sufficient to keep the particulate polymer in suspension and a preservative, to provide an isotonic cleansing composition.
Claim 12
Dependent Claim
102 words
An aqueous ophthalmic cleansing composition for cleaning a contact lens comprising an effective amount of a substantially spherical particulate polymer for the removal of proteinaceous and lipid deposits on said contact lens, said particulate polymer selected from the group consisting of polyethylene, cellulose acetate butyrate, polycarbonate, poly 11-undecamide, polyvinyl chloride and mixtures thereof wherein said particulate polymer has a particle size from about twenty microns to about one hundred microns, and a carrier in which said particulate polymer is suspended, said carrier having a viscosity sufficient to keep the particulate polymer in suspension and a preservative, to provide an isotonic cleansing composition.
Claim 13
Dependent Claim
50 words
A cleansing composition as recited in claim 10 wherein said carrier is compatible with ocular tissue and comprises a thickener wherein said thickener is selected from the group consisting of polyethylene glycol, carboxy vinyl polymers, cellulose, hydroxyethyl cellulose, methoxy cellulose, low molecular weight hydroxyethylmethacrylate, polyvinyl alcohol, polyvinylpyrrolidine and mixtures thereof.
Claim 14
Dependent Claim
27 words
A cleansing composition as recited in claim 11 wherein said particulate polymer is precipitated from solution, said precipitation rendering the shape of said particles of said polymer.
Claim 15
Dependent Claim
15 words
A cleansing composition as recited in claim 11 wherein said particulate polymer is poly 11-undecamide.
Claim 16
Dependent Claim
27 words
A cleansing composition as recited in claim 3 wherein said particulate polymer is precipitated from solution, said precipitation rendering the shape of said particles of said polymer.
Claim 17
Dependent Claim
14 words
A cleansing composition as recited in claim 14 wherein said composition includes sodium choride.
Claim 18
Dependent Claim
25 words
A cleansing composition as recited in claim 10 wherein said particulate polymer comprises from about 5 to about 20 percent by weight of said composition.
Claim 19
Dependent Claim
16 words
A cleansing composition as recited in claim 10 wherein said particulate polymer is poly 11- undecamide.
Claim 20
Dependent Claim
25 words
A cleansing composition as recited in claim 17 wherein said poly 11-undecamide comprises from about 5 to about 20 percent by weight of said composition.
Claim 21
Dependent Claim
14 words
A cleansing composition as recited in claim 10 wherein said composition includes sodium chloride.
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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) | 1988-01-15 | 1988-07-16 | 1989-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-15 | 1992-07-16 | 1993-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-15 | 1996-07-16 | 1997-01-15 | $7700.00 | Window Closed / Lapsed |