US5281277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid composition for contact lenses and method for cleaning a contact lens
Assignee: Tomei Sangyo KK
•
Filing: 1992-04-08
•
Granted: 1994-01-25
•
Expires: 2012-04-08
Abstract
Abstract A liquid composition for contact lenses, having from 5 to 40% (w/v) of glycerol and from 4 to 20% (w/v) of boric acid and/or a borate incorporated to a solution containing an effective amount of a protease, in such a ratio that the boric acid and/or the borate is from 10 to 100 parts, preferably 10-20 parts, by weight per 100 parts by weight of the glycerol.
Inventors
- 👤 Akira Nakagawa
- 👤 Satoko Kondo
- 👤 Yoshiko Oi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:07
CPC Classifications
A; A61; A61L; A61L12/00; A61L12/08; A61L12/082; C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0078; C11D3/16; C11D3/38; C11D3/386; C11D3/38663
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
67 words
A stable aqueous liquid composition for cleaning contact lenses, comprising 5 to 40% (w/v) of glycerol and from 4 to 8% (w/v) of boric acid and/or a borate incorporated to a solution containing an effective cleaning amount of a protease, in such a ratio that the boric acid and/or the borate is from 10 to 20 parts by weight per 100 parts by weight of the glycerol.
Claim 2
Dependent Claim
67 words
A stable aqueous liquid composition for cleaning contact lenses, comprising 5 to 40% (w/v) of glycerol and from 4 to 8% (w/v) of boric acid and/or a borate incorporated to a solution containing an effective cleaning amount of a protease, in such a ratio that the boric acid and/or the borate is from 10 to 20 parts by weight per 100 parts by weight of the glycerol.
Claim 3
Dependent Claim
22 words
The liquid composition for cleaning contact lenses according to claim 1, which further contains not higher than 30% (w/v) of a surfactant.
Claim 4
Dependent Claim
25 words
The liquid composition for cleaning contact lenses according to claim 1, wherein the borate is borax, potassium borate, lithium borate, ammonium borate or triethanolamine borate.
Claim 5
Dependent Claim
24 words
The liquid composition for cleaning contact lenses according to claim 1, wherein the protease is in an amount of from 0.01 to 20% (w/v).
Claim 6
Dependent Claim
18 words
A liquid composition according to claim 1, further comprising from 0.01 to 0.2% (w/v) of a calcium salt.
Claim 7
Dependent Claim
45 words
A method for cleaning a contact lens, which comprises diluting the liquid composition for cleaning contact lenses as defined in claim 1, with an aqueous medium, and contacting the contact lens to the diluted liquid composition, to remove a soil deposited on the contact lens.
Claim 8
Dependent Claim
60 words
A method for cleaning a contact lens, which comprises diluting the liquid composition for cleaning contact lenses as defined in claim 1, with an aqueous medium, contacting the contact lens to the diluted liquid composition at a temperature of from 5° to 80° C. for 1 minute to 24 hours, followed by boiling for sterilization in the diluted liquid composition.
References Cited (Backward Citations)
US3910296A
Cited
US3910296B1
Cited
FR2369338A1
Cited
GB2079305A
Cited
EP0080748A1
Cited
US4404115A
Cited
US4462922A
Cited
US4614549A
Cited
EP0141607A2
Cited
US4690773A
Cited
US4537706A
Cited
US4670179A
Cited
US4900366A
Cited
EP0348183A2
Cited
US4959179A
Cited
EP0462460A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-01-24 | 1997-07-26 | 1998-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-24 | 2001-07-26 | 2002-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-24 | 2005-07-26 | 2006-01-25 | $7700.00 | Window Closed / Lapsed |