Inventor · Leipzig, DE

Walter Lehmann

24Patents
3h-index
47Co-inventors
63Inventor score

Filing activity: Feb 13, 1997 → Oct 27, 2022

Most-cited inventions

PatentTitleAreaCited byStatus
US5839295A Refrigeration/heat pump module Mechanical Engineering; Lighting; Heating 15 Expired
US7637126B2 Method for the production of laser-active quartz glass and use thereof Chemistry; Metallurgy 12 Active
US9580348B2 Method for producing synthetic quartz glass granules Chemistry; Metallurgy 8 Active
US10336645B2 Rare earth metal-doped quartz glass and method for producing the same Electricity 1 Active
US8347650B2 Method of producing a quartz glass crucible Chemistry; Metallurgy 1 Active
US8789391B2 Method and apparatus for producing a crucible of quartz glass Chemistry; Metallurgy 1 Active
US10730780B2 Preparation of a quartz glass body in a multi-chamber oven Emerging Cross-Sectional Technologies 1 Active
US11512017B2 Method and apparatus for producing a glass component Chemistry; Metallurgy 0 Active
US11299417B2 Preparation of a quartz glass body in a melting crucible of refractory metal Emerging Cross-Sectional Technologies 0 Active
US9828691B2 Silicon block, method for producing the same, crucible of transparent or opaque fused silica suited for performing the method, and method for the production thereof Chemistry; Metallurgy 0 Active
US11459262B2 Method and device for homogenizing glass Chemistry; Metallurgy 0 Active
US10851008B2 Method for producing a component of rare earth metal-doped quartz glass Chemistry; Metallurgy 0 Active
US12060293B2 Process for the preparation of synthetic quartz glass Chemistry; Metallurgy 0 Active
US9856576B2 Pulling a semiconductor single crystal according to the Czochralski method Emerging Cross-Sectional Technologies 0 Active
US11485671B2 Method for homogenizing glass Chemistry; Metallurgy 0 Active
US11708290B2 Preparation of a quartz glass body in a multi-chamber oven Emerging Cross-Sectional Technologies 0 Active
US9003832B2 Method of making a silica crucible in a controlled atmosphere Emerging Cross-Sectional Technologies 0 Active
US11492285B2 Preparation of quartz glass bodies from silicon dioxide granulate Emerging Cross-Sectional Technologies 0 Active
US10618833B2 Preparation of a synthetic quartz glass grain Emerging Cross-Sectional Technologies 0 Active
US8387413B2 Method for producing a component with a layer of transparent quartz glass Emerging Cross-Sectional Technologies 0 Active
US9409810B2 Method for producing synthetic quartz glass granules Chemistry; Metallurgy 0 Active
US12246981B2 Method for homogenizing glass Chemistry; Metallurgy 0 Active
US12246982B2 Process for the preparation of synthetic quartz glass Chemistry; Metallurgy 0 Active
US10287705B2 Pulling a semiconductor single crystal according to the Czochralski method and silica glass crucible suitable therefor Emerging Cross-Sectional Technologies 0 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.