Laird C. Fletcher

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Natchitoches, LA, US

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Patents Grantslast 30 patents

Information Patent Grant
Solvent extraction process for rerefining used lubricating oil
- Patent number 4,399,025
- Issue date Aug 16, 1983
- Delta Central Refining, Inc.
- Laird C. Fletcher
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Distillation and solvent extraction process for rerefining used lub...
- Patent number 4,360,420
- Issue date Nov 23, 1982
- Delta Central Refining, Inc.
- Laird C. Fletcher
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Method of rerefining used lubricating oil
- Patent number 4,342,645
- Issue date Aug 3, 1982
- Delta Central Refining, Inc.
- Laird C. Fletcher
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Solvent extraction process for rerefining used lubricating oil
- Patent number 4,302,325
- Issue date Nov 24, 1981
- Delta Central Refining, Inc.
- Laird C. Fletcher
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...