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PARK CHEM CO

Overview
  • Total Patents
    49
About

PARK CHEM CO has a total of 49 patent applications. Its first patent ever was published in 1917. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets materials and metallurgy, surface technology and coating and machines are ORTIZ RODRIGUEZ ANSELMO, EXPANITE TECH A/S and GOEHRING WERNER.

Patent filings per year

Chart showing PARK CHEM COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Foreman Robert W 20
#2 Kramer Paul H 7
#3 Wesala Robert J 5
#4 Ives Michael T 4
#5 Fox Charles R 4
#6 Dubal Gajen P 4
#7 Meszaros Anthony G 3
#8 Stroh James A 3
#9 Bourg Joseph N 2
#10 Pontius Jon S 2

Latest patents

Publication Filing date Title
US4738731A Method of heat treating metal using a washable synthetic quenchant
US4904423A Pressure molding process using salt cores and composition for making cores
WO8403857A1 Pressure molding process using salt cores and a composition for making cores
US4473403A Mold release agents for open-cell molded foamed articles and means of application
CA1207641A Recovery and recycle of nitrate and nitrite salts from chloride containing quench bath solids
US4491523A Method for treating barium toxic water using low-temperature stabilized polyacrylamide compositions
US4491607A Mold release agents and means of application
US4396439A Recovery and recycle of nitrate and nitrite salts from chloride containing quench bath solids
CA1160547A Method of stripping paint in a molten salt bath
US4251292A Method for restoring molecular weight distribution of a polymeric quenchant
GB2043699A Cyanide-free carburizing process and composition
DE2907879A1 Carbon diffusion process for case hardening ferrous metals - where carburising is achieved in salt bath contg. graphite particles and air bubbles, but no cyanide
US4149702A Method and apparatus for recycling heat treating salts
US4153481A Cyanide-free carburizing process and composition
US4009112A Pelletized rectifier for molten neutral salt baths and method
US4001038A Method of stripping paint in a molten salt bath
US3902929A Water-based quenching composition comprising polyvinylpyrrolidone and method of quenching
US3865642A Water based quenching composition and method
US3793208A Method of rectifying commercial salt baths
CA944665A Cyanide free carburizing composition apparatus and process