Karl E. Wiegand — 10 Patents at Ethyl

Karl E. Wiegand has been granted 10 US patents while listed as an inventor at Ethyl. The first was granted in 1980 and the most recent in December 1998. Karl E. Wiegand ranks #481,000 of 4,157,543 US inventors in our database (top 11.6%). Patent records list Karl E. Wiegand in Baton Rouge, LA, US.

Issued Patents All Time

Showing 1–10 of 10 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
5847177	Production of hydrocarbon-soluble hydrocarbylaluminoxanes	Samuel A. Sangokoya	1998-12-08	$1,222,000
5565395	Aluminoxanate compositions	Samuel A. Sangokoya, Milham S. Howie, Patrick G. Simms	1996-10-15	$2,904,000
5252345	Zeolite compositions	Patrick C. Hu, James S. Staton	1993-10-12	$10,394,000
5183061	Silicon compounds in bone treatment	Patrick C. Hu	1993-02-02	$16,771,000
4954448	Modulation of adenylate cyclase response	Robert K. Rude	1990-09-04	$10,747,000
4917045	Silicon compounds in poultry hatching	Patrick C. Hu	1990-04-17	$4,398,000
4870191	Silicon containing reaction product	Patrick C. Hu	1989-09-26	$2,721,000
4595742	Di(alkylthio)diamine chain extenders for polyurethane elastomers	Christopher J. Nalepa, Paul F. Ranken	1986-06-17	$21,920,000
4374256	Process for the preparation of pyrryl-2-acetonitrile	James Kao	1983-02-15	$1,119,000
4187230	Preparation of 5-aroyl-pyrrole compounds	James Kao, Michael J. Dagani	1980-02-05	$3,482,000

Karl E. Wiegand — 10 Patents

Issued Patents All Time

Patent Widget