VK

Vera A. Keppen

Overall (All Time): #4,039,750 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4467115 Method for preparing branched polyethylenimine David S. Zhuk, Nikolai A. Sivov, Gennady F. Tereschenko, Igor Golubkov, Valery E. Timofeev 1984-08-21