Norman L Laliberte

US Patent:

40908305, May 23, 1978

Filed:

Jul 19, 1976

Appl. No.:

5/706724

Inventors:

Norman U. Laliberte - South Woodstock CT

Assignee:

American Optical Corporation - Southbridge MA

International Classification:

B29C 500
B29D 1100

US Classification:

425117

Abstract:

A mold for casting a polarizing ophthalmic lens from a fluid thermosetting monomeric resin wherein the mold unit includes convex and a concaved mold elements spaced apart by a peripheral gasket and includes therebetween a polarizing sheet defining first and second molding compartments thereabout such that the polarizing sheet while forming a part of the mold structure is cast in situ in the ophthalmic lens and becomes an integral part thereof.

US Patent:

42738091, Jun 16, 1981

Filed:

Oct 25, 1979

Appl. No.:

6/088318

Inventors:

Norman U. LaLiberte - Woodstock CT
Don H. Rotenberg - Westboro MA

Assignee:

American Optical Corporation - Southbridge MA

International Classification:

B05D 702
B05D 506

US Classification:

427155

Abstract:

Cast resin lenses which are removed from casting molds early in a cure cycle are coated for protection against exposure to oxygen to provide increased post cure surface polymerization and abrasion resistance.

US Patent:

41396944, Feb 13, 1979

Filed:

May 1, 1978

Appl. No.:

5/902014

Inventors:

Norman U. Laliberte - Woodstock CT

Assignee:

American Optical Corporation - Southbridge MA

International Classification:

C08G 6352

US Classification:

528280

Abstract:

Composition of matter and process for imparting a colorless appearance to cast allyl diglycol carbonate articles such as lenses and lens blanks and for simultaneously imparting to the article an ability to fluoresce when subjected to ultraviolet light. The composition comprises about 40 parts maleic anhydride, maleic acid, copolymers of propylene glycol with maleic acid or maleic anhydride, or mixtures thereof, and between about 0. 5 and 1. 5 parts of a mixture of 10 parts cobalt acetyl acetonate and between about 0. 4 parts to 1. 2 parts copper acetyl acetonate. Between about 0. 05 and 0. 15 parts of the composition is mixed with 1600 parts allyl diglycol carbonate monomer-catalyst prepolymer mixture and cast to form the desired article.

US Patent:

39703622, Jul 20, 1976

Filed:

Jul 3, 1974

Appl. No.:

5/485398

Inventors:

Norman U. Laliberte - Woodstock CT

Assignee:

American Optical Corporation - Southbridge MA

International Classification:

G02B 108
G02B 104
G02C 712

US Classification:

350155

Abstract:

A laminated optical element is produced by prepositioning a polarizing sheet, which has been coated on both sides with adhesive compatible with the encasing material, in a mold so as to accurately space the polarizing sheet from the inner mold surfaces, injecting a monomer of allyl diglycol carbonate into the mold so as to completely encase the polarizing sheet, and then curing the laminate. The process includes producing stress free castings capable of being subjected to subsequent color accepting treatment and various finishing processes. The laminated product provides a fully encased polarizing sheet with a thin layer of uniform thickness of the polymer on the front side of the polarizing sheet which may be readily finished for optical devices.

US Patent:

42385245, Dec 9, 1980

Filed:

Mar 6, 1978

Appl. No.:

5/883768

Inventors:

Norman U. LaLiberte - Woodstock CT
Don H. Rotenberg - Westboro MA

Assignee:

American Optical Corporation - Southbridge MA

International Classification:

G02B 110
C09K 1100

US Classification:

427 7

Abstract:

A fade resistant, visually undetectable identification mark is imparted to an optically clear plastic lens or the like by providing a marking composition comprising a fluorescent dye and a liquid carrier material, and preferably including an inert sublimable solid diluent, applying the composition in a selected pattern on the surface of an article to be marked, removing the carrier material from the composition to leave a solid residue of the fluorescent dye and inert solid diluent, and permanently transferring the dye to a surface layer of the article as by heating. The mark enables a manufacturer to identify a particular article as its product by exposing it to ultraviolet radiation, yet the mark does not adversely affect the visible light optical properties of the article.