US4585488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for disinfecting contact lenses
Assignee: American Optical Corp
•
Filing: 1982-12-20
•
Granted: 1986-04-29
•
Expires: 2002-12-20
Abstract
Abstract A method for disinfecting and cleaning contact lenses is disclosed wherein the lenses are first treated with a peroxide solution to effect disinfection and then are subsequently treated with a catalyst which decomposes the peroxide in a rapid, turbulent manner so as to facilitate removal of surface contamination. The catalyst is preferably catalase, which when used as an aqueous solution is particularly effective in increasing the speed and thoroughness of peroxide removal from the lenses.
Inventors
- 👤 Gunter Giefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:55
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/16; A61L2/18; A01; A01N; A01N59/00; A61L12/00; A61L12/08; A61L12/12; A61L12/124; A61L12/126
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
64 words
A method for decomposing residual hydrogen peroxide adhering to a contact lens following sterilization of the lens with hydrogen peroxide and thereby rendering said lens suitable for wearing without any further sterilization or decomposition of hydrogen peroxide which comprises contacting said lens with an aqueous isotonic solution of dissolved catalase in an amount sufficient to decompose the residual hydrogen peroxide adhering to the lens.
Claim 2
Independent Claim
64 words
A method for decomposing residual hydrogen peroxide adhering to a contact lens following sterilization of the lens with hydrogen peroxide and thereby rendering said lens suitable for wearing without any further sterilization or decomposition of hydrogen peroxide which comprises contacting said lens with an aqueous isotonic solution of dissolved catalase in an amount sufficient to decompose the residual hydrogen peroxide adhering to the lens.
Claim 3
Dependent Claim
18 words
A method according to claim 1 wherein said aqueous isotonic solution contains about 0.8 to 1.0% sodium chloride.
Claim 4
Independent Claim
68 words
A method for disinfecting and cleaning a contact lens so that it is suitable for wearing without any further sterilization or decomposition of hydrogen peroxide which comprises contacting said lens with an aqueous solution of hydrogen peroxide to effect the sterilization thereof, then subsequently contacting said lens with an aqueous isotonic solution of dissolved catalase in an amount sufficient to decompose the residual peroxide adhering to said lens.
Claim 5
Independent Claim
68 words
A method for disinfecting and cleaning a contact lens so that it is suitable for wearing without any further sterilization or decomposition of hydrogen peroxide which comprises contacting said lens with an aqueous solution of hydrogen peroxide to effect the sterilization thereof, then subsequently contacting said lens with an aqueous isotonic solution of dissolved catalase in an amount sufficient to decompose the residual peroxide adhering to said lens.
Claim 6
Dependent Claim
18 words
A method according to claim 3 wherein said aqueous isotonic solution contains about 0.8 to 1.0% sodium chloride.
References Cited (Backward Citations)
US2956994A
Cited
US3240709A
Cited
US3282702A
Cited
US3594330A
Cited
US3700761A
Cited
US3912451A
Cited
JPS5036685A
Cited
US4101380A
Cited
US4013410A
Cited
JPS5324093A
Cited
US4096870A
Cited
US4368081A
Cited
US4473550A
Cited
US4414127A
Cited
US4521375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |