David Alker
23Patents
9h-index
12Co-inventors
68Inventor score
Filing activity: Mar 5, 1984 → Dec 11, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5344835A | Piperidine and pyrrolidine derivatives | Chemistry; Metallurgy | 25 | Expired |
| US5358953A | Imidazopyridine PAF/H.sub.1 antagonists | Human Necessities | 24 | Expired |
| US5397800A | Certain 1-azabicyclo[2.2.1]heptanes useful as muscarinic receptor antagonists | Chemistry; Metallurgy | 18 | Expired |
| US5607950A | Muscarinic receptor antagonists | Chemistry; Metallurgy | 18 | Expired |
| US5418229A | Muscarinic receptor antagonists | Chemistry; Metallurgy | 17 | Expired |
| US5486527A | Anticholinergic agents | Chemistry; Metallurgy | 16 | Expired |
| US6262046A | Azetidinylpropylpiperidine derivatives, intermediates and use as tachykinin antagonists | Chemistry; Metallurgy | 13 | Expired |
| US5071844A | 5,11-dihydrodibenzo[b,e][1,4]-thiazepines useful as gastro intestinal selective calcium antagonists | Chemistry; Metallurgy | 12 | Expired |
| US4618609A | Anti-ischaemic and antihypertensive 2-[pyrimidyloxy alhoxymethyl]-1,4-dihydropyridines | Chemistry; Metallurgy | 9 | Expired |
| US4590195A | 4-aryl-3,5-bis(alkoxycarbonyl)-6-methyl -2-aminoalkyloxymethyl-1,4-dihydropyridine antihypertensive agents | Chemistry; Metallurgy | 6 | Expired |
| US5089505A | 1-arylethyl-3-substituted piperidines | Chemistry; Metallurgy | 6 | Expired |
| US4654353A | Antihypertensive 2-hydroxyalkoxyalkyl dihydropyridines | Chemistry; Metallurgy | 5 | Expired |
| US4568677A | 2-(4-Pyrimidone alkoxyalkyl) dihydropyridine anti-ischaemic and antihypertensive agents | Chemistry; Metallurgy | 5 | Expired |
| US5231104A | 1-arylethyl-3-substituted piperidines | Chemistry; Metallurgy | 4 | Expired |
| US4892881A | Dihydropyridine anti-ischaemic and antihypertensive agents | Chemistry; Metallurgy | 3 | Expired |
| US4732985A | 2-oxygen containing heteroalkoxyalkyl dihydropyridine intermediates | Chemistry; Metallurgy | 3 | Expired |
| US4548935A | Dihydropyridine anti-ischaemic and anti-hypertensive agents, compositions and use | Chemistry; Metallurgy | 2 | Expired |
| US5192765A | Certain amines which are muscarinic receptor antagonists | Chemistry; Metallurgy | 2 | Expired |
| US6380396B1 | Quaternary ammonium compounds | Chemistry; Metallurgy | 2 | Expired |
| US4957930A | Dihydropyridine derivatives | Human Necessities | 2 | Expired |
| US5410046A | 1-arylethyl-3-substituted piperidines | Chemistry; Metallurgy | 2 | Expired |
| US6207678A | Quaternary ammonium compounds as tachykinin antagonists | Chemistry; Metallurgy | 2 | Expired |
| US5534626A | 1-arylethyl-3-substituted piperidines | Chemistry; Metallurgy | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.