Patricia L. Kwiatkowski

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Akron, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for preparing variable-light transmittance article
- Patent number 5,021,196
- Issue date Jun 4, 1991
- PPG Industries, Inc.
- John C. Crano
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Photochromic compound and articles containing the same
- Patent number 4,986,934
- Issue date Jan 22, 1991
- PPG Industries, Inc.
- Patricia L. Kwiatkowski
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Variable-light transmittance article and method for preparing same
- Patent number 4,968,454
- Issue date Nov 6, 1990
- PPG Industries, Inc.
- John C. Crano
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Photochromic compound and articles containing the same
- Patent number 4,936,995
- Issue date Jun 26, 1990
- PPG Industries, Inc.
- Patricia L. Kwiatkowski
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Photochromic compound and articles containing the same
- Patent number 4,931,219
- Issue date Jun 5, 1990
- PPG Industries, Inc.
- Patricia L. Kwiatkowski
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Photochromic compound and articles containing the same
- Patent number 4,792,224
- Issue date Dec 20, 1988
- PPG Industries, Inc.
- Patricia L. Kwiatkowski
- C07 - ORGANIC CHEMISTRY