CL

Charles S. Letcher

PE Petrolite: 1 patents #81 of 143Top 60%
Overall (All Time): #4,125,838 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4239546 Hydrocarbon polymers to improve the hardness of waxes Stephen E. Russell, Phillip M. Story 1980-12-16