Roland Langner
13Patents
6h-index
19Co-inventors
59Inventor score
Filing activity: May 6, 1983 → Nov 8, 2001
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5585091A | Use of benzazoles UV absorbers, new benzazoles and a process for their preparation | Chemistry; Metallurgy | 61 | Expired |
| US4562067A | Preparation of novel dibenzoylmethane derivative sunscreen agents | Chemistry; Metallurgy | 55 | Expired |
| US5783725A | Stabilized lactic acid menthyl ester | Chemistry; Metallurgy | 21 | Expired |
| US5527519A | Finely divided, highly pure neutral zinc oxide powder, a process for its preparation and its use | Chemistry; Metallurgy | 20 | Expired |
| US5965066A | Indanylidene compounds, a process for their preparation and their use as UV absorbers | Chemistry; Metallurgy | 16 | Expired |
| US5961960A | Use of substituted benzazoles as UV absorbers, new benzazoles and processes for their preparation | Chemistry; Metallurgy | 8 | Expired |
| US6037473A | Use of substituted benzazoles as UV absorbers, new benzazoles and processes for their preparation | Chemistry; Metallurgy | 6 | Expired |
| US4455295A | N-(p-Sulfophenyl) cinnamamide as sunscreen agent | Human Necessities | 5 | Expired |
| US6039939A | N-acyl-hydroxyamino acid esters and their use | Chemistry; Metallurgy | 4 | Expired |
| US6042814A | Sulphonic acids and their use as UV absorbers | Chemistry; Metallurgy | 3 | Expired |
| US6153175A | Indanylidene compounds, a process for their preparation and their use as UV absorbers | Chemistry; Metallurgy | 1 | Expired |
| US6258963A | Benzylidene-.gamma.-butyrolactones, process for their preparation and their use as UV absorber | Human Necessities | 1 | Expired |
| US7208142B2 | Indanylidene compounds | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.