Otto Arndt
23Patents
4h-index
8Co-inventors
56Inventor score
Filing activity: Feb 6, 1976 → Jan 22, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD257785S | Receiver for a golf ball chipping game | General | 12 | Expired |
| US5208365A | Process for the preparation of 2,5-di(phenylamino)-terephthalic acid and its dialkyl esters in high purity | Chemistry; Metallurgy | 8 | Expired |
| US5616779A | Process for the preparation of 2,5-di-phenylamino-terephthalic acid and its dialkyl esters | Chemistry; Metallurgy | 8 | Expired |
| US4246196A | Diaminophenyl ureas | Chemistry; Metallurgy | 6 | Expired |
| US5149850A | Process for the production of high-purity tetrachloro-1,4-benzoquinone | Chemistry; Metallurgy | 3 | Expired |
| US4254054A | Process for the manufacture of 4-nitro-4'-amino-diphenylamine-2-sulfonic acid and 2-nitro-4'-amino-diphenylamine-4-sulfonic acid | Chemistry; Metallurgy | 3 | Expired |
| US4540832A | Process for the preparation of 6-chloro-2,4-dinitrophenol | Chemistry; Metallurgy | 3 | Expired |
| US5347038A | Process of the preparation of 2,5-di-phenylamino-terephthalic acid and its dialkyl esters in a high purity | Chemistry; Metallurgy | 2 | Expired |
| US4613698A | Process for the preparation of 6-chloro-2,4-dinitroaniline | Chemistry; Metallurgy | 2 | Expired |
| US5151532A | Process for the production of high-purity tetrachloro-1,4-benzoquinone | Chemistry; Metallurgy | 2 | Expired |
| US5599992A | Process for the preparation of 2-fluorophenylhydrazine | Chemistry; Metallurgy | 1 | Expired |
| USD249718S | PROJECTOR FOR TOY GOLF BALLS OR THE LIKE | General | 1 | Expired |
| US4487725A | Process for the preparation of N-acetylaminoarylsulfonic acids in sulfuric acid as solvent | Chemistry; Metallurgy | 1 | Expired |
| US4605767A | Process for the preparation of 2,6-dichloro-4-nitroaniline | Chemistry; Metallurgy | 1 | Expired |
| US4552970A | Solvated salts of dinitrophenylcyanamides, and a process for the preparation thereof | Chemistry; Metallurgy | 1 | Expired |
| US4658034A | Process for the preparation of 2,6-dichlorobenzoxazole | Chemistry; Metallurgy | 1 | Expired |
| US4242275A | Process for the preparation of isomer-free toluene-4-sulfonic acid | Chemistry; Metallurgy | 1 | Expired |
| US5559257A | Process for the preparation of tetrachloro-1,4-benzoquinone | Chemistry; Metallurgy | 0 | Expired |
| US4824962A | Process for the preparation of naphthostyril | Chemistry; Metallurgy | 0 | Expired |
| US5451699A | Process for the preparation of crystalline, salt-free, chlorine-substituted 3-nitrobenzenesulfonic acid hydrates | Chemistry; Metallurgy | 0 | Expired |
| US4316861A | N-Nitroaryl-N-halosulfonyl ureas | Chemistry; Metallurgy | 0 | Expired |
| US5525744A | Process for the preparation of tetrachloro-1,4-benzoquinone | Chemistry; Metallurgy | 0 | Expired |
| US4908478A | Single-vessel process for preparing 2-acetaminonaphthalene-6-sulfonic acid of high purity | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.