US4710313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent composition for contact lenses
Assignee: Lion Corp
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Filing: 1986-06-12
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Granted: 1987-12-01
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Expires: 2006-06-12
Abstract
Abstract This invention provides a detergent composition by which proteinaceous depositions can be easily removed from contact lenses in a short time, and method for removing such depositions from the contact lenses. The detergent composition comprises (A) at least one glycosidase selected from the group consisting of amylase, cellulase, pectinase, hemicellulase, alginase, heparinase and dextranase; and (B) at least one activator selected from the group consisting of urea, thiourea, acid salts of guanidine, reductants, amino acids and salts thereof.
Inventors
- 👤 Nobuyuki Miyajima
- 👤 Kenji Hata
- 👤 Junichi Nakayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:37
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0078; A; A61; A61L; A61L12/00; A61L12/08; A61L12/082; C11D3/16; C11D3/38; C11D3/386; C11D3/38636; C11D3/38645
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
75 words
A detergent composition used for cleaning contact lenses, which comprises 0.005 to 10% by weight of (A) at least one glycosidase selected from the group consisting of cellulase, pectinase, and hemicellulase; 0.01 to 20% by weight of (B) at least one activator selected from the group consisting of urea, thiourea, amino acids and salts thereof, sulfurous acid alkali metal salts, hydrogen sulfurous acid alkali metal salts, thioglycerin, dithiothreitol and dithioerythritol and the balance being water.
Claim 2
Dependent Claim
75 words
A detergent composition used for cleaning contact lenses, which comprises 0.005 to 10% by weight of (A) at least one glycosidase selected from the group consisting of cellulase, pectinase, and hemicellulase; 0.01 to 20% by weight of (B) at least one activator selected from the group consisting of urea, thiourea, amino acids and salts thereof, sulfurous acid alkali metal salts, hydrogen sulfurous acid alkali metal salts, thioglycerin, dithiothreitol and dithioerythritol and the balance being water.
Claim 3
Dependent Claim
15 words
A detergent composition as set forth in claim 1, wherein the component (A) in hemicellulase.
Claim 4
Dependent Claim
35 words
A detergent composition as set forth in claim 1 wherein the amount of the component (A) is 0.05 to 5% by weigth and the amount of the component (B) is 0.01 to 10% by weight.
References Cited (Backward Citations)
US3741901A
Cited
US3983002A
Cited
US4195974A
Cited
WO1979000963A1
Cited
US4285738A
Cited
GB2088581A
Cited
US4404115A
Cited
EP0093784A1
Cited
JPS58209713A
Cited
US4443355A
Cited
US4609493A
Cited
US4610800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |