W. C. Heraeus GmbH
151Patents
32Active
151Granted
46Portfolio score
Filing activity: Mar 20, 1975 → Apr 21, 2011 · 28 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4937496A | Xenon short arc discharge lamp | Electricity | 109 | Expired |
| US4591537A | Combination of AlN-Y.sub.2 O.sub.3 heat conductive ceramic substrate and electronic component | Emerging Cross-Sectional Technologies | 71 | Expired |
| US5931867A | Radially expandable support device | Human Necessities | 50 | Expired |
| US4519966A | Low-contamination AlN crucible for monocrystal pulling and method | Emerging Cross-Sectional Technologies | 49 | Expired |
| US4336329A | Method and apparatus for treatment of biological substances, particularly for cultivation of biological cells and tissues, or of microorganisms | Emerging Cross-Sectional Technologies | 49 | Expired |
| US5762768A | Target for cathodic sputtering and method for producing the target | Chemistry; Metallurgy | 48 | Expired |
| US8528201B2 | Method of producing an electrical bushing with gradient cermet | Emerging Cross-Sectional Technologies | 45 | Active |
| US8494635B2 | Method for sintering electrical bushings | Emerging Cross-Sectional Technologies | 45 | Active |
| US5723027A | Method for preparing a powder in a plasma arc and device for carrying out said method | Performing Operations; Transporting | 44 | Expired |
| US5038261A | Operating lamp with adjustable mounting | Emerging Cross-Sectional Technologies | 43 | Expired |
| US4440178A | Implantable electrode | Human Necessities | 43 | Expired |
| US4848923A | Method and system to transmit signals being generated by a measuring sensor, and specifically a temperature sensor | Physics | 37 | Expired |
| US4050052A | Electrical temperature measuring resistor structure, particularly for resistance thermometers | Electricity | 35 | Expired |
| US4884008A | Auto-adjustable operating room light | Emerging Cross-Sectional Technologies | 35 | Expired |
| US6089051A | Warp-knit fabric of noble metal-containing wires, and method for the production thereof | Emerging Cross-Sectional Technologies | 34 | Expired |
| US5796019A | Method of manufacturing an electrically conductive cermet | Chemistry; Metallurgy | 33 | Expired |
| US4039286A | Automatic chemical analysis apparatus | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4844746A | Method of producing a tantalum stock material of high ductility | Chemistry; Metallurgy | 30 | Expired |
| US4142940A | Cultivation containers for cultures, microorganisms, cells, tissue and the like | Chemistry; Metallurgy | 29 | Expired |
| US4395750A | Operating room light | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4138604A | Electrical plug-type connector | Emerging Cross-Sectional Technologies | 28 | Expired |
| US5486721A | Lead frame for integrated circuits | Electricity | 28 | Expired |
| US4765874A | Laminated electrode the use thereof | Chemistry; Metallurgy | 27 | Expired |
| US4028657A | Deposited layer type thermometric resistance structure | Electricity | 26 | Expired |
| US5356674A | Process for applying ceramic coatings using a plasma jet carrying a free form non-metallic element | Chemistry; Metallurgy | 26 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.