US4122942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophilic contact lens case
Assignee: Individual
•
Filing: 1975-07-21
•
Granted: 1978-10-31
•
Expires: 1995-07-21
Abstract
Abstract A hydrophilic contact lens with at least the surfaces formed of a high molecular weight synthetic polymer, is treated by exposure to a plasma of an inert gas under near-vacuum conditions. The treated lenses are stored in aqueous solution held in a plastic storage case, at least the interior surfaces of the storage case having also been treated with the inert gas plasma to also render its interior surfaces hydrophilic.
Inventors
- 👤 Leonard G. Wolfson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:17
CPC Classifications
A; A45; A45C; A45C11/00; A45C11/005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
71 words
A storage case for hydrophilic contact lenses, said cases comprising; a well formed of high molecular weight synthetic polymeric material substantially softer than the material of said lens, and having a sealable cap dimensioned to fit over said well, the interior surface of said well having been treated by exposure to a plasma of an inert gas at a pressure substantially below atmospheric until said interior surfaces have been rendered hydrophilic.
Claim 2
Dependent Claim
71 words
A storage case for hydrophilic contact lenses, said cases comprising; a well formed of high molecular weight synthetic polymeric material substantially softer than the material of said lens, and having a sealable cap dimensioned to fit over said well, the interior surface of said well having been treated by exposure to a plasma of an inert gas at a pressure substantially below atmospheric until said interior surfaces have been rendered hydrophilic.
Claim 3
Independent Claim
80 words
A method of storing hydrophilic contact lenses said method comprising the steps of: forming a well with an interior surface of a high molecular weight synthetic polymeric material, said material being substantially softer than the material of said lens, exposing at least the interior surface of said well to a plasma of an inert gas at pressures substantially below atmospheric until said interior surface has been rendered hydrophilic, and placing said lenses and an aqueous storage solution in said well.
Claim 4
Independent Claim
80 words
A method of storing hydrophilic contact lenses said method comprising the steps of: forming a well with an interior surface of a high molecular weight synthetic polymeric material, said material being substantially softer than the material of said lens, exposing at least the interior surface of said well to a plasma of an inert gas at pressures substantially below atmospheric until said interior surface has been rendered hydrophilic, and placing said lenses and an aqueous storage solution in said well.
Claim 5
Dependent Claim
27 words
Method as defined in claim 2 including the step of releasibly sealing said well with a removable cap, said cap being dimensioned to fit over said well.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |