Learn more

SARGENT WELCH SCIENTIFIC CO

Overview
  • Total Patents
    55
About

SARGENT WELCH SCIENTIFIC CO has a total of 55 patent applications. Its first patent ever was published in 1964. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets engines, pumps and turbines, measurement and mechanical elements are VARIAN SPA, KYKY TECHNOLOGY CO LTD and PFEIFFER VACUUM GMBH.

Patent filings per year

Chart showing SARGENT WELCH SCIENTIFIC COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Shapiro Ascher H 7
#2 Hanson David E 7
#3 Frenkel Martin E 5
#4 Osterstrom Gordon E 5
#5 Boostrom Roy E 2
#6 Mandell Arman 2
#7 Fishman Stanley D 2
#8 Lanham Charles W Jr 2
#9 Schrader W F 2
#10 Osterstrom G E 1

Latest patents

Publication Filing date Title
US4767265A Turbomolecular pump with improved bearing assembly
US4806075A Turbomolecular pump with improved bearing assembly
US4674952A Turbo molecular pump with improved bearing assembly
CA1240302A Turbomolecular pump with improved bearing system
US4519755A Gerotor vacuum pump
CA1196615A Gerotor vacuum pump
US4366834A Back-flow prevention valve
US4043054A Teaching machine
US3806259A Holder unit for optical instrumental analysis system
US3771877A Densitometer incorporating optical attenuator with direct readout of optical density
US3704950A Electrical system for use in optical densitometry
GB1330150A Impeller assemblies for high vacuum pumps
US3672838A Analytical method and apparatus using diffusion across a boundary between liquids
US3623826A Turbine pump with improved rotor and seal constructions
US3644051A Turbomolecular and stator pump having improved rotor construction
US3625019A Vacuum pump with demountable cold trap and getter pump
US3616680A Leak detector
US3584966A Vacuum pump construction
US3619055A Exposure control device
US3545100A Selector mechanism