Patent US4361548A successfully refreshed from Google Patents.
US4361548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact lens disinfecting and preserving solution (polymeric)
Assignee: Bausch and Lomb Inc
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Filing: 1980-11-28
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Granted: 1982-11-30
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Expires: 2000-11-28
Abstract
Abstract A disinfecting and/or preserving solution for contact lenses is disclosed. The disinfecting solution is an aqueous solution containing 0.00001 to 0.1 weight percent of a dimethyldiallylammonium chloride homopolymer having a molecular weight from about 10,000 to about 1,000,000, optionally together with up to 0.5 weight percent of ethylenediaminetetraacetic acid or other enhancers and optional buffers and the like.
Inventors
- 👤 Francis X. Smith
- 👤 Thomas M. Riedhammer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:23
CPC Classifications
A; A01; A01N; A01N33/00; A01N33/02; A01N33/12; A61; A61L; A61L12/00; A61L12/08; A61L12/14; A61L12/143; A61L12/145
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
43 words
An aqueous solution for preserving or disinfecting soft contact lenses having as the active antimicrobial agent dimethyldiallylammonium chloride homopolymer, having a molecular weight from about 10,000 to 1,000,000, present in an amount from about 0.00001 to about 0.1 weight percent of said composition.
Claim 2
Dependent Claim
43 words
An aqueous solution for preserving or disinfecting soft contact lenses having as the active antimicrobial agent dimethyldiallylammonium chloride homopolymer, having a molecular weight from about 10,000 to 1,000,000, present in an amount from about 0.00001 to about 0.1 weight percent of said composition.
Claim 3
Dependent Claim
19 words
The composition of claim 1 wherein the amount of homopolymer is from about 0.0004 to about 0.02 weight percent.
Claim 4
Dependent Claim
25 words
A method of disinfecting contact lenses comprising contacting the lenses for a sufficient time to disinfect the lenses with the aqueous solution of claim 1.
Claim 5
Dependent Claim
26 words
A method of inhibiting microorganism growth when sterilized contact lenses are stored in a solution comprising storing the lenses in the aqueous solution of claim 1.
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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) | 1985-11-29 | 1986-05-31 | 1986-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-29 | 1990-05-31 | 1990-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-29 | 1994-05-31 | 1994-11-30 | $7700.00 | Window Closed / Lapsed |