Growing community of inventors

Oakmont, PA, United States of America

William J Birkmeyer

Average Co-Inventor Count = 2.28

ph-index = 9

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 237

William J BirkmeyerRonald J Lewarchik (7 patents)William J BirkmeyerJ Alden Erikson (5 patents)William J BirkmeyerRostyslaw Dowbenko (4 patents)William J BirkmeyerCarl C Anderson (2 patents)William J BirkmeyerCharles M Kania (1 patent)William J BirkmeyerDebra L Singer (1 patent)William J BirkmeyerTruman F Wilt (1 patent)William J BirkmeyerRoger M Christenson (1 patent)William J BirkmeyerJames A Claar (1 patent)William J BirkmeyerStephen John Thomas (1 patent)William J BirkmeyerRalph C Gray (1 patent)William J BirkmeyerRudolf Maska (1 patent)William J BirkmeyerJoseph M Carney (1 patent)William J BirkmeyerDavid C Kapp (1 patent)William J BirkmeyerJoseph A Klanica (1 patent)William J BirkmeyerJohn B Saunders, Jr (1 patent)William J BirkmeyerWilliam J Schillinger (1 patent)William J BirkmeyerEllor J VanBuskirk (1 patent)William J BirkmeyerWilliam J Birkmeyer (15 patents)Ronald J LewarchikRonald J Lewarchik (9 patents)J Alden EriksonJ Alden Erikson (17 patents)Rostyslaw DowbenkoRostyslaw Dowbenko (62 patents)Carl C AndersonCarl C Anderson (8 patents)Charles M KaniaCharles M Kania (54 patents)Debra L SingerDebra L Singer (52 patents)Truman F WiltTruman F Wilt (47 patents)Roger M ChristensonRoger M Christenson (45 patents)James A ClaarJames A Claar (35 patents)Stephen John ThomasStephen John Thomas (26 patents)Ralph C GrayRalph C Gray (22 patents)Rudolf MaskaRudolf Maska (21 patents)Joseph M CarneyJoseph M Carney (17 patents)David C KappDavid C Kapp (10 patents)Joseph A KlanicaJoseph A Klanica (5 patents)John B Saunders, JrJohn B Saunders, Jr (4 patents)William J SchillingerWilliam J Schillinger (3 patents)Ellor J VanBuskirkEllor J VanBuskirk (3 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Ppg Industries, Inc. (15 from 2,825 patents)


15 patents:

1. 5468802 - Low volatile organic content automotive refinish coating composition

2. 4775597 - Ultraviolet light curable compositions for application to porous

3. 4690980 - Acrylic modified polymers

4. 4517322 - Acrylated alkyd and polyester resins

5. 4356277 - Reaction products of a polyglycidyl ether of a polyphenol and an amino

6. 4314918 - Coating compositions containing organic alcoholic reactive diluents

7. 4299747 - Reaction products of a polyglycidyl ether of a polyphenol and an amino

8. 4283428 - Beverage containers coated with a water-based liner

9. 4252935 - Esters of diglycidyl polyethers of hydrogenated phenols and coating

10. 4228294 - Esters of imidazolidinedione-based diepoxides and coating compositions

11. 4221891 - Esters of imidazolidinedione-based triepoxides and coating compositions

12. 4206104 - N,N-'-Dihydroxyalkyl ester substituted imidazolidinediones and coating

13. 4187380 - Esters of imidazolidinedione-based triepoxides

14. 4174337 - Hydroxy-functional esters of substituted imidazolidinediones and

15. 4123422 - Amide modified saturated polyester polyols and method of making

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as of
12/17/2025
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