Inventor
STONE CHARLES
US22 patents
⚠️ This page may combine multiple inventors who share the name “STONE CHARLES”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BALLARD POWER SYSTEMS
15 patentsUS5422411AJun 6, 1995
Trifluorostyrene and substituted trifluorostyrene copolymeric compositions and ion-exchange membranes formed therefrom
BALLARD POWER SYSTEMS123 citations97
US5985942ANov 16, 1999
α, β, β-trifluorostyrene-based composite membranes
BALLARD POWER SYSTEMS43 citations96
US5834523ANov 10, 1998
Substituted α,β,β-trifluorostyrene-based composite membranes
BALLARD POWER SYSTEMS64 citations96
US6723758B2Apr 20, 2004
Graft polymeric membranes and ion-exchange membranes formed therefrom
BALLARD POWER SYSTEMS95 citations95
US6689501B2Feb 10, 2004
Composite ion exchange membrane for use in a fuel cell
BALLARD POWER SYSTEMS46 citations92
US6437011B2Aug 20, 2002
α,β, β-trifluorostyrene-based composite membranes
BALLARD POWER SYSTEMS25 citations92
US6359019B1Mar 19, 2002
Graft polymeric membranes and ion-exchange membranes formed therefrom
BALLARD POWER SYSTEMS40 citations92
US5684192ANov 4, 1997
Substituted trifluorostyrene monomeric compositions
BALLARD POWER SYSTEMS21 citations92
US5602185AFeb 11, 1997
Substituted trifluorostyrene compositions
BALLARD POWER SYSTEMS28 citations92
US5773480AJun 30, 1998
Trifluorostyrene and substituted trifluorostyrene copolymeric compositions and ion-exchange membranes formed therefrom
BALLARD POWER SYSTEMS40 citations91
US5498639AMar 12, 1996
Trifluorostyrene and substituted trifluorostyrene copolymeric ion-exchange membranes
BALLARD POWER SYSTEMS26 citations91
US6765027B2Jul 20, 2004
Ion-exchange materials with improved ion conductivity
BALLARD POWER SYSTEMS22 citations88
US6258861B1Jul 10, 2001
α,β,β-trifluorostyrene-based composite membranes
BALLARD POWER SYSTEMS12 citations82
US6653515B2Nov 25, 2003
Synthesis of α, β, β-trifluorostyrene via in-situ formation of trifluorovinyl metal halide
BALLARD POWER SYSTEMS2 citations60
US6497977B1Dec 24, 2002
Method of making stripped porous polymer films
BALLARD POWER SYSTEMS6 citations54
FREQUENCY ELECTRONICS INC
3 patentsUS7106143B2Sep 12, 2006
Method for achieving highly reproducible acceleration insensitive quartz crystal oscillators
FREQUENCY ELECTRONICS INC26 citations88
US6577201B2Jun 10, 2003
Precision oven-controlled crystal oscillator
FREQUENCY ELECTRONICS INC11 citations70
US6753737B2Jun 22, 2004
Precision oven-controlled crystal oscillator
FREQUENCY ELECTRONICS INC3 citations59