P

Inventor

LIGAS JOHN S

US8 patents
⚠️ This page may combine multiple inventors who share the name “LIGAS JOHN S”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

TRANSITIONS OPTICAL INC

6 patents
US5391327AFeb 21, 1995

Photochromic compositions of improved fatigue resistance

TRANSITIONS OPTICAL INC221 citations95
US11256014B2Feb 22, 2022

Optical articles and method of preparing the same

TRANSITIONS OPTICAL INC2 citations71
US12055741B2Aug 6, 2024

Optical articles and method of preparing the same

TRANSITIONS OPTICAL INC0 citations61
US11714220B2Aug 1, 2023

Optical article with gradient light influencing properties and method of making the same

TRANSITIONS OPTICAL INC0 citations61
US11199653B2Dec 14, 2021

Optical article with gradient light influencing properties and method of making the same

TRANSITIONS OPTICAL INC0 citations61
US12076951B2Sep 3, 2024

Method of making optical articles having gradient light influencing properties

TRANSITIONS OPTICAL INC0 citations50

PPG INDUSTRIES INC

1 patent
US5289547AFeb 22, 1994

Authenticating method

PPG INDUSTRIES INC178 citations93

DEMEIO RACHEL L

1 patent
US9030740B2May 12, 2015

Photochromic article having at least partially crossed polarized photochromic-dichroic and fixed-polarized layers

DEMEIO RACHEL L6 citations64