Helmut L. Merten

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Hudson, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Process for producing N,N'-disubstituted paraphenylene diamine mixt...
- Patent number 4,900,868
- Issue date Feb 13, 1990
- Monsanto Company
- Helmut L. Merten
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Making nitrodiarylamines
- Patent number 4,614,817
- Issue date Sep 30, 1986
- Monsanto Company
- Otto W. Maender
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Production of cyclohexylamine
- Patent number 4,384,142
- Issue date May 17, 1983
- Monsanto Company
- Helmut L. Merten
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
N,N'-Bis(1-cyclohexyl-1-ethyl)-p-phenylenediamine, and rubber compo...
- Patent number 4,297,269
- Issue date Oct 27, 1981
- Monsanto Company
- Helmut L. Merten
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Making nitrodiarylamines from formyl derivatives of aromatic amines...
- Patent number 4,196,146
- Issue date Apr 1, 1980
- Monsanto Company
- Helmut L. Merten
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Making a nitrodiarylamine by reacting an alkali metal salt of a for...
- Patent number 4,187,248
- Issue date Feb 5, 1980
- Monsanto Company
- Helmut L. Merten
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
N,N'-dialkyl-p-phenylenediamine mixture
- Patent number 3,968,080
- Issue date Jul 6, 1976
- Monsanto Company
- Helmut Ludwig Merten
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...