Michael Langsam
20Patents
11h-index
16Co-inventors
68Inventor score
Filing activity: Aug 5, 1982 → Nov 19, 1998
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6187248A | Nanoporous polymer films for extreme low and interlayer dielectrics | Electricity | 41 | Expired |
| US4952220A | Membranes formed from unsaturated polyimides | Performing Operations; Transporting | 40 | Expired |
| US4897092A | Polyimide membrane having improved flux | Performing Operations; Transporting | 36 | Expired |
| US4657564A | Fluorinated polymeric membranes for gas separation processes | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4859215A | Polymeric membrane for gas separation | Performing Operations; Transporting | 28 | Expired |
| US4954144A | Polyimide membranes and their use for gas separation | Chemistry; Metallurgy | 24 | Expired |
| US5061298A | Gas separating membranes formed from blends of polyimide polymers | Chemistry; Metallurgy | 21 | Expired |
| US5042993A | Gas separating membranes from polyimide polymers | Chemistry; Metallurgy | 20 | Expired |
| US4759776A | Polytrialkylgermylpropyne polymers and membranes | Performing Operations; Transporting | 13 | Expired |
| US5045093A | Gas separating membranes from polyimide polymers and a process for using the same | Chemistry; Metallurgy | 11 | Expired |
| US4931182A | Membranes formed from unsaturated polyimides | Performing Operations; Transporting | 11 | Expired |
| US5034027A | Membranes formed from rigid aromatic polyamides | Chemistry; Metallurgy | 10 | Expired |
| US5939520A | Gas separation membranes based on regiospecific polyamide-imides | Emerging Cross-Sectional Technologies | 9 | Expired |
| US5055616A | Ortho-alkylated bisanilines having fluorenylidene bridging groups | Chemistry; Metallurgy | 9 | Expired |
| US4956095A | Water or gas purification by bulk absorption | Performing Operations; Transporting | 2 | Expired |
| US4990667A | Alkylated 1,1-bis(4-aminophenyl)-1-phenyl-2,2,2-trifluoroethanes | Chemistry; Metallurgy | 2 | Expired |
| US4451625A | Reduction of wall fouling in the suspension polymerization of vinyl chloride homopolymer | Chemistry; Metallurgy | 2 | Expired |
| US4808679A | Process for controlling the molecular weight of poly(trialkylsilylpropyne) polymers | Chemistry; Metallurgy | 1 | Expired |
| US4902763A | Process for the polymerization tri-substituted silylalkynes | Performing Operations; Transporting | 1 | Expired |
| US4835229A | Catalyst and process for the preparation of tri-substituted silylalkynes | Performing Operations; Transporting | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.