Baldev Singh
66Patents
10h-index
24Co-inventors
78Inventor score
Filing activity: Mar 3, 1975 → Jan 24, 2006
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5294612A | 6-heterocyclyl pyrazolo [3,4-d]pyrimidin-4-ones and compositions and method of use thereof | Chemistry; Metallurgy | 194 | Expired |
| US4963561A | Imidazopyridines, their preparation and use | Chemistry; Metallurgy | 64 | Expired |
| US5573750A | Diagnostic imaging x-ray contrast agents | Performing Operations; Transporting | 52 | Expired |
| US5656629A | 6-substituted pyrazolo (3,4-d)pyrimidin-4-ones and compositions and methods of use thereof | Human Necessities | 36 | Expired |
| US5541187A | 6-heterocycyclyl pyrazolo[3,4-d]pyrimidin-4-ones and compositions and method of use thereof | Chemistry; Metallurgy | 34 | Expired |
| US5977118A | 6-substituted pyrazolo[3,4-d]pyrimidin-4-ones and compositions and methods of use thereof | Human Necessities | 27 | Expired |
| US4524149A | 5-Alkanoyl-6-alkyl-2(1H)-pyridinones, their preparation and their cardiotonic use | Chemistry; Metallurgy | 26 | Expired |
| US5736548A | 6-aryl pyrazolo3,4-D! pyrimidin-4-ones and compositions and method of use thereof | Human Necessities | 20 | Expired |
| US4560691A | 5-(Phenyl)-1,6-naphthyridin-2(1H)-ones, their cardiotonic use and preparation | Chemistry; Metallurgy | 15 | Expired |
| US4415580A | Certain 2-(1H)-pyridinones cardiotonic compositions containing same and method of using same | Chemistry; Metallurgy | 11 | Expired |
| US4412077A | Process for preparing 5-(lower-alkanoyl)-6-(lower-alkyl)-2(1H)-pyridinone | Chemistry; Metallurgy | 10 | Expired |
| US4432981A | 2-(Pyridinyl or hydroxyphenyl)-8-substituted pyrido[2,3-d]pyrimidin-5(8H)-ones | Chemistry; Metallurgy | 10 | Expired |
| US5603916A | 3 5-bis alkanoyl amino-2 4 6-triiodobenzyl esters | Chemistry; Metallurgy | 10 | Expired |
| US5958929A | 6-aryl pyrazolo 3,4-d! pyrimidin-4-ones and compositions and methods of use thereof | Human Necessities | 9 | Expired |
| US3992380A | 5,8-Dihydro-5-oxo-2-(4-or 3-pyridinyl)pyrido[2,3-d]pyrimidine-6-carboxylic acids and esters | Chemistry; Metallurgy | 9 | Expired |
| US4504482A | [5(or 4)-(Pyridinyl)-2-pyrimidinyl]ureas and cardiotonic use thereof | Chemistry; Metallurgy | 9 | Expired |
| US5075319A | Pyridinyl-quinolone compounds, their preparation and use | Chemistry; Metallurgy | 8 | Expired |
| US5010086A | Imidazopyridines, compositions and use | Chemistry; Metallurgy | 8 | Expired |
| US4567186A | 5-Heteryl-1,6-naphthyridin-2(1H)-ones, cardiotonic use thereof and intermediates therefor | Chemistry; Metallurgy | 7 | Expired |
| US4413127A | Preparation of 1,2-dihydro-6-(lower alkyl)-2-oxo-5-(pyridinyl)nicotinonitriles | Chemistry; Metallurgy | 7 | Expired |
| US4331671A | 5-(Pyridinyl)-1H-benzimidazoles and 1-hydroxy-6-(pyridinyl)-1H-benzimidazoles and their cardiotonic use | Human Necessities | 6 | Expired |
| US5384107A | Iodinated aromatic compounds | Chemistry; Metallurgy | 5 | Expired |
| US4018770A | N-(2-(pyridinyl)-4-pyrimidinyl)-aminomethylenemalonates and analogs | Human Necessities | 5 | Expired |
| US4297362A | 4-(3,4-Diaminophenyl)pyridine or salts, and use thereof as cardiotonic | Chemistry; Metallurgy | 5 | Expired |
| US4347363A | Process for preparing 1,2-dihydro-6-methyl-2-oxo-5-(pyridinyl)nicotinonitriles | Chemistry; Metallurgy | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.