PPG Industries Ohio, Inc.
1,736Patents
1,024Active
1,736Granted
59Portfolio score
Filing activity: Jul 27, 1990 → Jul 12, 2024 · 363 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6235858A | Aminoplast curable film-forming compositions providing films having resistance to acid etching | Chemistry; Metallurgy | 463 | Expired |
| US6535126B2 | Electrochromic transparency incorporating security system | Physics | 249 | Expired |
| US6471360B2 | Switchable electrochromic devices with uniform switching and preferential area shading | Physics | 167 | Expired |
| US6187444A | Photochromic polyurethane coating and articles having such a coating | Emerging Cross-Sectional Technologies | 163 | Expired |
| US6296785A | Indeno-fused photochromic naphthopyrans | Physics | 162 | Expired |
| US5973819A | Method and apparatus for controlling an electrochromic device | Physics | 148 | Expired |
| US6099117A | Hinge with wire extending therethrough | Physics | 141 | Expired |
| US5973818A | Method and apparatus for controlling an electrochromic device | Physics | 140 | Expired |
| US5978126A | Apparatus for controlling an electrochromic device | Physics | 140 | Expired |
| US6495251B1 | Silicon oxynitride protective coatings | Emerging Cross-Sectional Technologies | 135 | Expired |
| US6614577B1 | Method and apparatus for controlling an electrochromic device | Physics | 127 | Expired |
| US6348604B1 | Photochromic naphthopyrans | Physics | 123 | Expired |
| US6153126A | Photochromic six-membered heterocyclilc-fused naphthopyrans | Chemistry; Metallurgy | 122 | Expired |
| US6268055A | Photochromic epoxy resin coating composition and articles having such a coating | Emerging Cross-Sectional Technologies | 116 | Expired |
| US6213602A | Metal bus bar and tab application method | Electricity | 113 | Expired |
| US6027766A | Photocatalytically-activated self-cleaning article and method of making same | Emerging Cross-Sectional Technologies | 112 | Expired |
| US6387519B1 | Cured coatings having improved scratch resistance, coated substrates and methods thereto | Emerging Cross-Sectional Technologies | 111 | Expired |
| US6060001A | Alkoxyacrylamide photochromic coatings compositions and photochromic articles | Emerging Cross-Sectional Technologies | 111 | Expired |
| US6603477B1 | Method of rendering a graphical display based on user's selection of display variables | Physics | 110 | Expired |
| US5942338A | Coated articles | Emerging Cross-Sectional Technologies | 106 | Expired |
| US6274164A | Glass fiber chemical delivery system | Human Necessities | 105 | Expired |
| US6602603B2 | Poly(meth)acrylic photochromic coating | Emerging Cross-Sectional Technologies | 104 | Expired |
| US6432544B1 | Aminoplast resin photochromic coating composition and photochromic articles | Emerging Cross-Sectional Technologies | 103 | Expired |
| US6531076B2 | Photochromic organic resin composition | Emerging Cross-Sectional Technologies | 102 | Expired |
| US6506488B1 | Aminoplast resin photochromic coating composition and photochromic articles | Emerging Cross-Sectional Technologies | 102 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.