Inventor · disambiguated record
Laird C. Fletcher
Also filed as: FLETCHER LAIRD C
4 granted patents·92 citations·filing 1980–1981
79Inventor score
Files withDELTA CENTRAL REFINING INC4
Top patents by PatentIndex Score
4 records- 0181US4360420ADistillation and solvent extraction process for rerefining used lubricating oilDELTA CENTRAL REFINING INC·Filed 1980·Granted Nov 23, 1982·33 cites·29 claims
- 0279US4399025ASolvent extraction process for rerefining used lubricating oilDELTA CENTRAL REFINING INC·Filed 1981·Granted Aug 16, 1983·29 cites·13 claims
- 0368US4342645AMethod of rerefining used lubricating oilDELTA CENTRAL REFINING INC·Filed 1980·Granted Aug 3, 1982·19 cites·20 claims
- 0452US4302325ASolvent extraction process for rerefining used lubricating oilDELTA CENTRAL REFINING INC·Filed 1980·Granted Nov 24, 1981·11 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →