Patent · US Expired

Process for forming intraocular lenses having haptics with high fracture toughness

US5182053A · kind A · utility

13Cited by

4References

9Claims

0Family size

Assignee

Optical Radiation Corporation · US

Inventors

Edwin A. Creasman · Fontana, US
Thomas Paul · Herne, DE
Kenneth E. Weber · Burbank, US
David R. Navarrete · Cerritos, US
Jimmy D. McCullough · Chino, US
Churchai T. Soodjinda · Walnut, US

Key dates

Filing date	Feb 28, 1991
Grant date	Jan 26, 1993
Priority date	—
Expiry date	Feb 28, 2011

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29K2995/0079
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A process for forming an intraocular lens with haptics having high fracture toughness mixing solid particles with an uncured polymer matrix and introducing the uncured mixture into a mold. Ultrasonic energy is then applied to the mold until the uncured mixture begins to solidify. Sufficient heat is then applied to the polymer mixture to completely cure the polymer. The cured polymer which will form the haptics, is then removed from the mold and a hole for forming the optic is formed in the cured polymer. An uncured polymer matrix suitable for use, when cured, as an optic, is then introduced into the hole and cured. An intraocular lens is then machined from the resulting cured composition.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.