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US4171878A Expired / Lapsed US ⏱️ 0.0 years remaining

Combined contact lens

Assignee: Individual
•
Filing: 1975-12-10
•
Granted: 1979-10-23
•
Expires: 1995-12-10
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Abstract

Abstract The combined contact lens is characterized in that it comprises a zone of a hydrophilic material, an aperture in the center of said zone, and a solid body from an optically transparent material fixed in said aperture, said solid body being made in the form of a rod bonded chemically with said zone. In the method for the manufacture of the combined contact lens, a hydroxyl-containing monomer is polymerized in the presence of an agent initiating polymerization, a solvent, and a linking agent, inside a mould provided with a rod located in the center of the mould and made from a polymer that is inactive toward water but swells in the solution of the starting hydroxyl-containing monomer. The invention provides good toleration of the lens with the patient and ensures optimum optical effect with various abnormalties of refraction and in various pathological states of the cornea.

Inventors

  • 👤 Anatoly A. Kivaev
  • 👤 Vladimir A. Barkov
  • 👤 Robert I. Ezrielev
  • 👤 Irina A. Arbuzova

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 21:29
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29D11/00038; B29D11/00019; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; G02C; G02C7/00; G02C7/02; G02C7/04

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 48 words
A combined contact lens consisting of a hydrated hydroxyl-containing material having at the center thereof a solid body of optically transparent material, wherein the surface of said solid body does not contact the cornea, said solid body being chemically bonded to said hydrated zone in the swollen state.
Claim 2
Dependent Claim 48 words
A combined contact lens consisting of a hydrated hydroxyl-containing material having at the center thereof a solid body of optically transparent material, wherein the surface of said solid body does not contact the cornea, said solid body being chemically bonded to said hydrated zone in the swollen state.
Claim 3
Dependent Claim 14 words
A combined contact lens according to claim 1, wherein said hydroxyl-containing material comprises polyoxyalkyl-methacrylate.
Claim 4
Dependent Claim 19 words
A combined contact lens according to claim 1 wherein said optically transparent material of the solid body comprises polymethylmethacrylate.
Claim 5
Dependent Claim 50 words
A combined contact lens consisting of a zone of hydrophilic polyoxyalkylmethacrylate, having at the center thereof and chemically bonded thereto, a solid body of optically transparent polymethylmethacrylate, wherein the surface of said optically transparent polymethylmethacrylate does not contact the cornea, and wherein said hydrophilic polyoxyalkylmethacrylate contacts the cornea and/or sclera.
Claim 6
Dependent Claim 50 words
A combined contact lens consisting of a zone of hydrophilic polyoxyalkylmethacrylate, having at the center thereof and chemically bonded thereto, a solid body of optically transparent polymethylmethacrylate, wherein the surface of said optically transparent polymethylmethacrylate does not contact the cornea, and wherein said hydrophilic polyoxyalkylmethacrylate contacts the cornea and/or sclera.
Claim 7
Dependent Claim 11 words
The contact lens of claim 4 wherein said polyoxyalkylmethacrylate is polyoxyethylmethacrylate.

References Cited (Backward Citations)

GB1045065A Cited
US3488111A Cited
US3619044A Cited
US3728317A Cited
US3944347A Cited
US3786812A Cited
DE2309933A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-10-22 1983-04-23 1983-10-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-10-22 1987-04-23 1987-10-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-10-22 1991-04-23 1991-10-23 $7700.00 Window Closed / Lapsed

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