Patent US4057063A successfully refreshed from Google Patents.
US4690773A
Expired / Lapsed
US
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Microbial enzymatic contact lens cleaner and methods of use
Assignee: Bausch and Lomb Inc
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Filing: 1986-05-07
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Granted: 1987-09-01
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Expires: 2006-05-07
Abstract
Abstract Proteinaceous tear films and debris are removed from contact lenses with aqueous solutions of a protease derived from a Bacillus, Streptomyces, or Aspergillus microorganism. The solutions are substantially odor-free, non-allergenic, require no activator/stabilizer and are completely water soluble.
Inventors
- 👤 Lai Ogunbiyi
- 👤 Francis X. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:02
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0078; C11D3/16; C11D3/38; C11D3/386; C11D3/38609
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
68 words
A method of cleaning an extended wear contact lens, which comprises contacting the lens for less than 2 hours with an effective amount of an activator-free, non-malodorous enzyme-containing solution comprising an aqueous solution containing a protease prepared by dissolution in aqueous solution of a contact lens cleaning tablet comprising from about 0.01 mg. to about 500 mg. of a protease derived from a Bacillus, Streptomyces, or Aspergillus microorganism.
Claim 2
Independent Claim
68 words
A method of cleaning an extended wear contact lens, which comprises contacting the lens for less than 2 hours with an effective amount of an activator-free, non-malodorous enzyme-containing solution comprising an aqueous solution containing a protease prepared by dissolution in aqueous solution of a contact lens cleaning tablet comprising from about 0.01 mg. to about 500 mg. of a protease derived from a Bacillus, Streptomyces, or Aspergillus microorganism.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein the lens is contacted with the solution for a period of time from 30 minutes to 1 hour.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein the protease is derived from Bacillus licheniformis.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein the protease is derived from Bacillus subtilis.
Claim 6
Dependent Claim
13 words
The method of claim 1 wherein the protease is derived from Aspergillus oryzae.
Claim 7
Dependent Claim
13 words
The method of claim 1 wherein the protease is derived from Streptomyces griseus.
Claim 8
Dependent Claim
15 words
The method of claim 1 wherein the enzyme-containing solution is prepared from an effervescent tablet.
Claim 9
Dependent Claim
15 words
The method of claim 1 wherein the enzyme-containing solution is prepared from a non-effervescent tablet.
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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) | 1990-08-31 | 1991-03-02 | 1991-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-31 | 1995-03-02 | 1995-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-31 | 1999-03-02 | 1999-09-01 | $7700.00 | Window Closed / Lapsed |