Gerd Leston

Person

Scott Township, PA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Complex formed to separate 3,5-xylenol or 3,4-xylenol from other po...
- Patent number 4,499,312
- Issue date Feb 12, 1985
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Complex formed to separate nitrated phenolic compounds from other p...
- Patent number 4,496,774
- Issue date Jan 29, 1985
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for alkylating phenolic compounds to produce ortho or para-...
- Patent number 4,480,140
- Issue date Oct 30, 1984
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Complex formed to separate nitrated phenolic compounds from other p...
- Patent number 4,479,019
- Issue date Oct 23, 1984
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for alkylating phenolic compounds to produce ortho- or para...
- Patent number 4,475,001
- Issue date Oct 2, 1984
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Complex formed for separating isopropylated m-cresols
- Patent number 4,469,901
- Issue date Sep 4, 1984
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Complex formed for separating chlorinated phenols
- Patent number 4,469,900
- Issue date Sep 4, 1984
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for separating nitrated phenolic compounds from other pheno...
- Patent number 4,447,654
- Issue date May 8, 1984
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for separating 3,5-xylenol or 3,4-xylenol from other polyme...
- Patent number 4,447,658
- Issue date May 8, 1984
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Reduction of o-ethylphenol in m,p-cresol by preferential t-butylation
- Patent number 4,431,846
- Issue date Feb 14, 1984
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for separating chlorinated phenols
- Patent number 4,429,168
- Issue date Jan 31, 1984
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for separating isopropylated m-cresols
- Patent number 4,429,169
- Issue date Jan 31, 1984
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for separating dihydric phenols
- Patent number 4,424,381
- Issue date Jan 3, 1984
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for separating t-butylated phenols
- Patent number 4,423,253
- Issue date Dec 27, 1983
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Para-cresol halide salt complex useful for separating para-cresol f...
- Patent number 4,394,526
- Issue date Jul 19, 1983
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for separating para-cresol from a mixture of methylated and...
- Patent number 4,267,389
- Issue date May 12, 1981
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for obtaining para-cresol and meta-cresol from a mixture of...
- Patent number 4,267,391
- Issue date May 12, 1981
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for obtaining para-cresol and meta-cresol from a mixture of...
- Patent number 4,267,390
- Issue date May 12, 1981
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for obtaining para-cresol and meta-cresol from a mixture of...
- Patent number 4,267,392
- Issue date May 12, 1981
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the methylation of phenolic compounds
- Patent number 4,158,101
- Issue date Jun 12, 1979
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Purification of 3,5-dialkylphenols
- Patent number 4,046,818
- Issue date Sep 6, 1977
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for the preparation of meta dihydroxybenzenes
- Patent number 4,009,212
- Issue date Feb 22, 1977
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Preparation of 5-sec-alkyl-m-cresol
- Patent number 3,992,455
- Issue date Nov 16, 1976
- Koppers Company, Inc.
- Gerd Leston
- C07 - ORGANIC CHEMISTRY

Gerd Leston

Person

Patents Grantslast 30 patents

Complex formed to separate 3,5-xylenol or 3,4-xylenol from other po...

Complex formed to separate nitrated phenolic compounds from other p...

Process for alkylating phenolic compounds to produce ortho or para-...

Complex formed to separate nitrated phenolic compounds from other p...

Process for alkylating phenolic compounds to produce ortho- or para...

Complex formed for separating isopropylated m-cresols

Complex formed for separating chlorinated phenols

Process for separating nitrated phenolic compounds from other pheno...

Process for separating 3,5-xylenol or 3,4-xylenol from other polyme...

Reduction of o-ethylphenol in m,p-cresol by preferential t-butylation

Process for separating chlorinated phenols

Process for separating isopropylated m-cresols

Process for separating dihydric phenols

Process for separating t-butylated phenols

Para-cresol halide salt complex useful for separating para-cresol f...

Process for separating para-cresol from a mixture of methylated and...

Process for obtaining para-cresol and meta-cresol from a mixture of...

Process for obtaining para-cresol and meta-cresol from a mixture of...

Process for obtaining para-cresol and meta-cresol from a mixture of...

Process for the methylation of phenolic compounds

Purification of 3,5-dialkylphenols

Method for the preparation of meta dihydroxybenzenes

Preparation of 5-sec-alkyl-m-cresol