US4039662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ophthalmic solution
Assignee: Alcon Puerto Rico Inc
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Filing: 1975-12-04
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Granted: 1977-08-02
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Expires: 1995-12-04
Abstract
Abstract Ophthalmic solution suitable as an artificial tear material of low viscosity containing a polysaccharide and benzalkonium chloride.
Inventors
- 👤 Gerald Hecht
- 👤 Charles D. Shively
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:31
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/70; A61K31/715; A61K9/00; A61K9/0012; A61K9/0048; A61P; A61P27/00; A61P27/02; A61P31/00; A61P31/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
An ophthalmic solution useful as an artificial tear comprising an aqueous solution of a polysaccharide selected from the group consisting of dextran and arabinogalactan, benzalkonium chloride, and water, said polysaccharide being present at a level of from about 0.001 to about 5 percent by weight and said benzalkonium chloride being present at a level of from about 0.001 to about 0.1 percent by weight.
Claim 2
Dependent Claim
64 words
An ophthalmic solution useful as an artificial tear comprising an aqueous solution of a polysaccharide selected from the group consisting of dextran and arabinogalactan, benzalkonium chloride, and water, said polysaccharide being present at a level of from about 0.001 to about 5 percent by weight and said benzalkonium chloride being present at a level of from about 0.001 to about 0.1 percent by weight.
Claim 3
Dependent Claim
13 words
An ophthalmic solution in accordance with claim 1 wherein said polysaccharide is dextran.
Claim 4
Dependent Claim
25 words
An ophthalmic solution in accordance with claim 2 wherein said dextran has a molecular weight in the range of from about 10,000 to about 1,000,000.
Claim 5
Dependent Claim
13 words
An ophthalmic solution in accordance with claim 1 wherein said polysaccharide is arabinogalactan.
Claim 6
Dependent Claim
22 words
An ophthalmic solution in accordance with claim 4 wherein said arabinogalactan has a molecular weight of from about 10,000 to about 250,000.
Claim 7
Dependent Claim
26 words
An ophthalmic solution in accordance with claim 1 which further comprises one or more monovalent cationic salts at a level sufficient to provide an isotonic solution.
Claim 8
Dependent Claim
15 words
An ophthalmic solution in accordance with claim 1 which further comprises a viscosity building agent.
Claim 9
Dependent Claim
30 words
An ophthalmic solution in accordance with claim 7 wherein said viscosity building agent is selected from the group consisting of natural gums, gelatin, starch derivatives, polymeric glycols, and cellulosic polymers.
References Cited (Backward Citations)
US2853414A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |