Inventor
XU HELEN
US5 patents
⚠️ This page may combine multiple inventors who share the name “XU HELEN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
POLYFUEL INC
4 patentsUS7094490B2Aug 22, 2006
Ion conductive block copolymers
POLYFUEL INC36 citations90
US7202001B2Apr 10, 2007
Sulfonated copolymer
POLYFUEL INC13 citations82
US7534515B2May 19, 2009
Acid-base proton conducting polymer blend membrane
POLYFUEL INC8 citations77
US7354679B2Apr 8, 2008
Ion conductive random copolymers
POLYFUEL INC4 citations60