Inventor · disambiguated record
John B. Sardisco
Also filed as: SARDISCO JOHN B
17 granted patents·292 citations·filing 1971–1983
95Inventor score
Files withPENNZOIL CO17
Top patents by PatentIndex Score
17 records- 0190US4045543AProduction of potassium sulfate and hydrogen chloridePENNZOIL CO·Filed 1975·Granted Aug 30, 1977·36 cites·6 claims
- 0285US3998935AManufacture of potassium sulfatePENNZOIL CO·Filed 1975·Granted Dec 21, 1976·32 cites·12 claims
- 0384US4268492AProcess for production of potassium sulfate and hydrochloric acidPENNZOIL CO·Filed 1979·Granted May 19, 1981·24 cites·12 claims
- 0482US3956464APreparation of phosphatesPENNZOIL CO·Filed 1971·Granted May 11, 1976·28 cites·24 claims
- 0580US4303610ATest kit for field analysis of plant tissue magnesium and calciumPENNZOIL CO·Filed 1980·Granted Dec 1, 1981·52 cites·13 claims
- 0673US4371512AProduction of alkali metal sulfatesPENNZOIL CO·Filed 1981·Granted Feb 1, 1983·20 cites·12 claims
- 0772US4055626AMethod of producing fluoride-free phosphoric acidPENNZOIL CO·Filed 1976·Granted Oct 25, 1977·14 cites·7 claims
- 0871US4435370APreparation of monocalcium phosphate and/or phosphoric acid from phosphate rockPENNZOIL CO·Filed 1981·Granted Mar 6, 1984·19 cites·10 claims
- 0964US4393032AProduction of phosphoric acid and additional products from phosphate orePENNZOIL CO·Filed 1982·Granted Jul 12, 1983·15 cites·55 claims
- 1061US4191734AFluoride-free phosphate reactionsPENNZOIL CO·Filed 1978·Granted Mar 4, 1980·11 cites·5 claims
- 1158US4060586ARecovery of fluorides from gypsumPENNZOIL CO·Filed 1976·Granted Nov 29, 1977·10 cites·8 claims
- 1253US4393030AUpgrading of phosphate orePENNZOIL CO·Filed 1982·Granted Jul 12, 1983·8 cites·2 claims
- 1353US4328196AProduction of alkali metal products from alkali metal fluosilicatePENNZOIL CO·Filed 1980·Granted May 4, 1982·7 cites·12 claims
- 1450US4137063AProduction of potassium polyphosphates from potassium silicofluoridesPENNZOIL CO·Filed 1977·Granted Jan 30, 1979·5 cites·11 claims
- 1547US4479923AProduction of phosphoric acid and additional products from phosphate orePENNZOIL CO·Filed 1983·Granted Oct 30, 1984·7 cites·31 claims
- 1638US4105748AMethod of producing phosphoric acid and potassium dihydrogen phosphate from phosphate rock in the substantial absence of fluorine evolutionPENNZOIL CO·Filed 1977·Granted Aug 8, 1978·3 cites·7 claims
- 1732US4343781ADecomposition of 2KCl.CuCl to produce cuprous chloride and potassium chloridePENNZOIL CO·Filed 1981·Granted Aug 10, 1982·1 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →