Hans Petersen
50Patents
12h-index
43Co-inventors
84Inventor score
Filing activity: Sep 21, 1973 → Jan 31, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4057636A | Antihypertensive pyridylguanidine compounds | Chemistry; Metallurgy | 38 | Expired |
| US6291689A | Method for the preparation of citalopram | Chemistry; Metallurgy | 31 | Expired |
| US6229026A | Method for the preparation of citalopram | Chemistry; Metallurgy | 29 | Expired |
| US6258842A | Method for the preparation of citalopram | Chemistry; Metallurgy | 29 | Expired |
| US6365747B1 | Method for the preparation of citalopram | Chemistry; Metallurgy | 24 | Expired |
| US5595989A | N-substituted azaheterocyclic carboxylic acids and esters thereof | Chemistry; Metallurgy | 18 | Expired |
| US5688788A | N-substituted azaheterocyclic carboxylic acids and esters thereof | Chemistry; Metallurgy | 16 | Expired |
| US6407267B1 | Method for the preparation of citalopram | Human Necessities | 14 | Expired |
| US6403813B1 | Method for the preparation of 5-carboxyphthalide | Chemistry; Metallurgy | 14 | Expired |
| US6426422B1 | Method for the preparation of citalopram | Human Necessities | 14 | Expired |
| US6392060B1 | Method for the preparation of 5-cyanophthalide | Chemistry; Metallurgy | 12 | Expired |
| US6420574B1 | Method for the preparation of citalopram | Human Necessities | 12 | Expired |
| US5795888A | N-substituted azaheterocyclic carboxlic acids and esters thereof | Chemistry; Metallurgy | 4 | Expired |
| US7112686B2 | Process for the preparation of racemic citalopram and/or S-or R-citalopram by separation of a mixture of R-and S-citalopram | Human Necessities | 4 | Expired |
| US6509483B2 | Method for the preparation of citalopram | Human Necessities | 4 | Expired |
| US6566540B2 | Method for the preparation of citalopram or S-citalopram | Human Necessities | 3 | Expired |
| US7390913B2 | Process for the preparation of racemic citalopram diol and/or S- or R-citalopram diols and the use of such diols for the preparation of racemic citalopram, R-citalopram and/or S-citalopram | Chemistry; Metallurgy | 2 | Expired |
| US5348965A | N-substituted azaheterocyclic carboxylic acids | Chemistry; Metallurgy | 2 | Expired |
| US5668129A | N-substituted azaheterocyclic carboxylic acids and esters thereof | Chemistry; Metallurgy | 2 | Expired |
| US5712292A | N-substituted azaheterocyclic carboxylic acids and esters thereof | Chemistry; Metallurgy | 2 | Expired |
| US7371863B2 | Method for manufacture of THIP | Human Necessities | 2 | Expired |
| US3956279A | Crystalline pivaloyloxymethyl d(-)-.alpha.-aminobenzylpenicillinate | Chemistry; Metallurgy | 2 | Expired |
| US7723533B2 | Crystalline base of escitalopram and orodispersible tablets comprising escitalopram base | Human Necessities | 2 | Active |
| US6864379B2 | Stepwise alkylation of 5-substituted 1-(4-fluorophenyl)-1,3-dihydroisobenzofurans | Human Necessities | 1 | Expired |
| US7560576B2 | Crystalline base of escitalopram and orodispersible tablets comprising escitalopram base | Human Necessities | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.