Inventor

Horst Weigel

Inventor

Rodenbach, DE

Overview

1977–2010

Patent span

Chemistry

Primary field (CPC C)

Patents· 36 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C07Cprimary

C07CAcyclic or carbocyclic compounds45%

C22BProduction and refining of metals17%

Y02PClimate change mitigation technologies in the production or processing of goods11%

C07DHeterocyclic compounds9%

C12PFermentation or enzyme-using processes to synthesise a desired chemical compound or composition or to separate optical isomers from a racemic mixture4%

C21BManufacture of iron or steel4%

B01DSeparation2%

B01JChemical or physical processes, e.g. catalysis or colloid chemistry2%

C07BGeneral methods of organic chemistry2%

C07HSugars2%

PatentTitleYear

7,670,986'Manganese dioxide catalyst for the hydrolysis of carbonitriles'2010 7,485,748'Process for the production of 2-hydroxy-4-methythiobutyric acid ammonium salt'2009 6,797,827'Process for the preparation of alpha-amino acids by hydrolysis of hydantoins at elevated pressure and elevated temperature'2004 6,552,222'Hydrolysis of acylamino acids'2003 6,329,535'Process for preparing esterified chroman compounds'2001 6,316,661'Process for the production of 2,3,5-trimethylhydroquinone diesters'2001 6,150,563'Aliphatic alkanals with improved storage stability and method of improving the storage stability'2000 6,103,924'Process for the preparation of 2,3,5-trimethylhydroquinone diesters'2000 6,048,988'Process for the production of .alpha.-tocopherol esters'2000 5,969,176'Process for the production of trimethylhydroquinone diesters and of trimethylhydroquinone'1999 5,672,745'Method for the continuous preparation of methionine or methionine derivatives'1997 5,049,283'Method for the recovery of aqueous solutions of free, neutral .alpha.-amino acids from aqueous solutions of their alkali-metal salts'1991 4,562,152'Process for obtaining pure L-leucine'1985 4,562,153'Process for the separation of L-leucine and L-isoleucine'1985 4,551,548'Process for the recovery of S-(carboxymethyl)-(R)-cysteine and S-(carboxymethyl)-(S)-cysteine'1985 4,511,719'N.alpha.-(3-Cyanopropanoyl)-aminocarboxylic acid derivatives and their use'1985 4,469,875'Optically active proline derivative, process for its production and use'1984 4,430,509'Process for the separation of the racemate (R,S)-cysteine'1984 4,426,532'.alpha.-(3-Cyano-propanoyl)-aminocarboxylic acid derivatives'1984 4,388,082'Device for obtaining large amounts of combustible gas from carbonaceous materials'1983 4,376,215'Process for the production of 4-aminobutyramide hydrochloride'1983 4,362,561'Method for the smelting of material such as ore concentrates'1982 4,358,311'Method and apparatus for the smelting of material such as ore concentrates'1982 4,322,552'Process for the production of 4-aminobutyramide hydrochloride'1982 4,313,894'Process for the production of 3-cyanopropionamide'1982 4,292,283'Method for the recovery of zinc'1981 4,283,045'Apparatus for the continuous recovery of tin from iron rich concentrates'1981 4,254,035'Process for the production of 2-acetamidocinnamic acid'1981 4,236,916'Method for the continuous recovery of tin from iron rich concentrates'1980 4,223,876'Apparatus for direct recovery of metal from metal-bearing ores'1980 4,179,284'Method for direct recovery of metal from metal-bearing ores'1979 4,127,408'Method for the continuous refinement of contaminated copper in the molten phase'1978 4,090,024'Process for the production of skatylhydantoin'1978 4,084,057'Process for the production of 4-acylamido-4, 4-dicarbalkoxy-butanalphenylhydrazone'1978 4,049,445'Method for thermal treatment of nickel ore'1977 4,017,307'Thermal method for the recovery of metals and/or metal combinations with the aid of a melting cyclone'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1983Patents assigned to KLOECKNER HUMBOLDT DEUTZ AG (9)· patent assignee history

1977–1983Based in Cologne, DE· patent location history

1978–2010Patents assigned to DEGUSSA (25)· patent assignee history

1978–1981Based in Hanau, DE· patent location history

1980Patents assigned to KLOECKNER HUMBOLDT WEDAG (2)· patent assignee history

1982–2010Based in Rodenbach, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
DEGUSSA	25	1978–2010
KLOECKNER HUMBOLDT DEUTZ AG	9	1977–1983
KLOECKNER HUMBOLDT WEDAG	2	1980

Locations

Location	Patents	Span
Rodenbach, DE	22	1982–2010
Cologne, DE	11	1977–1983
Hanau, DE	3	1978–1981