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US3578850A Expired / Lapsed US ⏱️ 0.0 years remaining

Anti-flare contact lens

Assignee: Individual
•
Filing: 1970-02-11
•
Granted: 1971-05-18
•
Expires: 1990-02-11
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Abstract

Abstract Contact lens, together with process and apparatus for making the contact lens, which has an annular surface area of irregular or waffled conformation for precluding the transmission of light therethrough.

Inventors

  • 👤 Alan H Grant

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 06:21
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/04; G02C7/046; Y; Y10; Y10S; Y10S451/00; Y10S451/921

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 177 words
A contact lens for wear on the eye, said lens being of one piece construction of the same material throughout, the material having a refractive index differing from that of the eye lacrimal fluid, said lens being substantially concavo-convex throughout its configuration, the concave surface being optically smooth and adapted to fit on the eye, said lens having a transparent centrally located optic area and a nonoptic area formed on the convex surface and surrounding said optic area, said nonoptic area having light-scattering means of macroscopic proportions formed only upon its convex surface, said light scattering means being formed by bombarding said nonoptic area with finely divided particles of a soft abradant randomly gas-born in a jet of high velocity for a time of approximately 10-20 seconds and at a pressure of approximately 50-60 p.s.i., said abradant being selected from the group consisting of one or more of the following: crushed walnut shells, crushed pecan shells, rottenstone, pumice and talcum powder; whereby any light striking said nonoptic area will be transmitted to the eye by irregular refraction.
Claim 2
Dependent Claim 177 words
A contact lens for wear on the eye, said lens being of one piece construction of the same material throughout, the material having a refractive index differing from that of the eye lacrimal fluid, said lens being substantially concavo-convex throughout its configuration, the concave surface being optically smooth and adapted to fit on the eye, said lens having a transparent centrally located optic area and a nonoptic area formed on the convex surface and surrounding said optic area, said nonoptic area having light-scattering means of macroscopic proportions formed only upon its convex surface, said light scattering means being formed by bombarding said nonoptic area with finely divided particles of a soft abradant randomly gas-born in a jet of high velocity for a time of approximately 10-20 seconds and at a pressure of approximately 50-60 p.s.i., said abradant being selected from the group consisting of one or more of the following: crushed walnut shells, crushed pecan shells, rottenstone, pumice and talcum powder; whereby any light striking said nonoptic area will be transmitted to the eye by irregular refraction.
Claim 3
Dependent Claim 26 words
The contact lens of claim 1 in which said light-scattering means on said nonoptic area are polished by buffing with a wet pure silk polishing medium.

References Cited (Backward Citations)

US2288143A Cited
FR1115140A Cited
US3339318A Cited
US3228741A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-05-17 1974-11-16 1975-05-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-05-17 1978-11-16 1979-05-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-05-17 1982-11-16 1983-05-18 $7700.00 Window Closed / Lapsed

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