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PENNZOIL CO

Overview
  • Total Patents
    127
About

PENNZOIL CO has a total of 127 patent applications. Its first patent ever was published in 1927. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets materials and metallurgy, basic materials chemistry and machines are NEGEV PHOSPHATES LTD, AGRICO CHEM CO and ECOPHOS.

Patent filings per year

Chart showing PENNZOIL COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Sardisco John B 29
#2 Drechsel Erhart K 21
#3 Holcomb Dysart E 11
#4 Johnson Evert F 8
#5 Holloway Tom C 8
#6 Lin Jia-Wen 8
#7 Drechsel E 7
#8 Magyar Arpad M 7
#9 Cavanaugh George S 6
#10 Drechsel Erhart Karl 6

Latest patents

Publication Filing date Title
CA1280502C Method for selection of mining and drilling sites using synthesized three dimensional seismic data
US4866659A Method for selection of mining and drilling sites using synthesized three dimensional seismic data
US4670500A Surface coating composition
US4648263A Support and centering attachments for sensitive viscometers
US4623447A Breaking middle phase emulsions
US4613446A Gelled detergent composition and cleaning pads containing same
US4670171A Surface cleaner composition
US4609406A Rust conversion coatings
US4501825A Tire sealer and inflator
US4672545A Method and apparatus for synthesizing three dimensional seismic data
US4479923A Production of phosphoric acid and additional products from phosphate ore
US4393030A Upgrading of phosphate ore
US4393032A Production of phosphoric acid and additional products from phosphate ore
US4435370A Preparation of monocalcium phosphate and/or phosphoric acid from phosphate rock
US4450069A Method for upgrading diene-containing hydrocarbon mixtures
US4387167A Sulfur-based adducts and compositions
US4343781A Decomposition of 2KCl.CuCl to produce cuprous chloride and potassium chloride
US4371512A Production of alkali metal sulfates
US4328196A Production of alkali metal products from alkali metal fluosilicate
US4303610A Test kit for field analysis of plant tissue magnesium and calcium