US4655957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact lens cleaning composition with polymeric beads
Assignee: Bausch and Lomb Inc
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Filing: 1986-04-28
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Granted: 1987-04-07
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Expires: 2006-04-28
Abstract
Abstract This invention relates to a cleansing composition comprising a particulate hydrophilic polymer or copolymer or mixture thereof and methods for cleaning various articles including contact lenses using the composition disclosed herein.
Inventors
- 👤 Richard C. Chromecek
- 👤 Lai Ogunbiyi
- 👤 Thomas M. Riedhammer
- 👤 Francis X. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:32
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0078; C11D17/00; C11D17/0008; C11D17/0013; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3765; C11D3/3769; C11D3/3776
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
An aqueous suspension for cleaning deposits from contact lenses and other articles comprising one or more surfactants selected from the group consisting of nonionic or amphoteric surfactants and 0.001 to 25 weight percent of a bead shaped particulate hydrophilic cross-linked vinyl-type homopolymer or copolymer selected from the group consisting of poly(hydroxyalkyl methacrylate), poly(hydroxyalkyl acrylate), and poly N-vinyl lactam or mixtures thereof.
Claim 2
Dependent Claim
61 words
An aqueous suspension for cleaning deposits from contact lenses and other articles comprising one or more surfactants selected from the group consisting of nonionic or amphoteric surfactants and 0.001 to 25 weight percent of a bead shaped particulate hydrophilic cross-linked vinyl-type homopolymer or copolymer selected from the group consisting of poly(hydroxyalkyl methacrylate), poly(hydroxyalkyl acrylate), and poly N-vinyl lactam or mixtures thereof.
Claim 3
Dependent Claim
14 words
The composition of claim 1 wherein said hydrophilic polymer or copolymer comprises poly(hydroxyethyl methacrylate).
Claim 4
Dependent Claim
42 words
The composition of claim 2 comprising poly(hydroxyethyl methacrylate) beads and a poly(oxypropylene)-poly(oxyethylene) adduct of ethylene diamine having a molecular weight ranging from about 14,500 to about 19,000 wherein at least 70 weight percent of the adduct is poly(oxyethylene), in an aqueous suspension.
Claim 5
Dependent Claim
23 words
The composition of claim 1 wherein the hydrophilic polymer is a spherical bead having a particle diameter of from 0.1 to 10 microns.
Claim 6
Independent Claim
33 words
A method for cleaning contact lenses comprising applying the composition claimed in any one of claims 1, 2-4 to a contact lens, rubbing the lens with said composition, and thereafter rinsing the lens.
Claim 7
Independent Claim
36 words
A method for cleaning contact lenses comprising applying the composition of any one of claims 1 and 2 through 6 to a cleansing pad, rubbing the contact lens with said pad, and thereafter rinsing the lens.
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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) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |