EP0359539A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Spuncast compound lens and method of manufacture
Assignee: Allergan Inc
•
Filing: 1989-09-13
•
Granted: —
•
Expires: 2009-09-13
Abstract
Abstract A reproducibly-made, wholly spuncast, non-truncated ballasted, compound surfaced soft contact lens and the method of making the same by spincasting a polymer forming mixture.
Inventors
- 👤 Robert E. Glick
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 09:28
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29D11/00038; B29D11/00115; B29C; B29C41/00; B29C41/02; B29C41/04; B29C41/042; B29C41/045; B29K; B29K2105/00; B29K2105/0002; B29L; B29L2011/00; B29L2011/0016; B29L2011/0025; B29L2011/0033
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
14 words
A reproducibly-made, wholly spuncasted, non-truncated, ballasted soft contact lens containing a compound anterior surface.
Claim 2
Dependent Claim
14 words
A reproducibly-made, wholly spuncasted, non-truncated, ballasted soft contact lens containing a compound anterior surface.
Claim 3
Dependent Claim
22 words
A lens as claimed in claim 1 wherein the contact lens is one of a toric and a bifocal soft contact lens.
Claim 4
Dependent Claim
30 words
A lens as claimed in claim 1 or 2 wherein the thickness profile of the lens is asymmetrical with respect to the lens' geometric centre to provide a prismatic lens.
Claim 5
Dependent Claim
34 words
A lens as claimed in any preceding claim wherein the thickness profile of the lens is substantially symmetrical with respect to the lens' geometric centre to provide a lens with a prism-free optic zone.
Claim 6
Dependent Claim
20 words
A lens as claimed in any preceding claim wherein the ballasting comprises thin sections at peripheral sections of the lens.
Claim 7
Dependent Claim
106 words
A process of reproducibly making a wholly spuncasted, non-truncated, ballasted soft contact lens containing a compound anterior surface which comprises spincasting a polymer-forming, lens-forming monomeric mixture in a cavity mould where the mould surface possesses the compound curvature and thin sectioned ballasting for the lens, rotating the monomer mixture in the mould whereby the mixture replicates the mould's surface while at the same time forms on polymerisation a corneal bowl free of the compound curvature and the thin sectioned ballasting, and initiating the polymerisation of the lens-forming monomer mixture during such rotation whereby to form a reproducible, non-truncated, thin-sectioned ballasted lens containing a compound anterior surface.
Claim 8
Dependent Claim
106 words
A process of reproducibly making a wholly spuncasted, non-truncated, ballasted soft contact lens containing a compound anterior surface which comprises spincasting a polymer-forming, lens-forming monomeric mixture in a cavity mould where the mould surface possesses the compound curvature and thin sectioned ballasting for the lens, rotating the monomer mixture in the mould whereby the mixture replicates the mould's surface while at the same time forms on polymerisation a corneal bowl free of the compound curvature and the thin sectioned ballasting, and initiating the polymerisation of the lens-forming monomer mixture during such rotation whereby to form a reproducible, non-truncated, thin-sectioned ballasted lens containing a compound anterior surface.
Claim 9
Dependent Claim
21 words
A process as claimed in claim 6 for making a lens as claimed in any one of claims 2 to 5.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.