Dietrich Speer
26Patents
6h-index
27Co-inventors
69Inventor score
Filing activity: Jun 23, 1989 → Feb 15, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5008223A | Grayish-black encapsulated pigments and method of their production | Chemistry; Metallurgy | 20 | Expired |
| US5194089A | Coated spinel color pigments, process for their production and use | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5439660A | Oxonitrides of the formula LnTaOn.sub.2 with enhanced brightness and a process for their production and use | Chemistry; Metallurgy | 10 | Expired |
| US6077797A | Green decoration coloring substance for high-temperature firing, process for its production and use thereof | Chemistry; Metallurgy | 7 | Expired |
| US5205866A | Method for making grey-black inclusion pigments | Chemistry; Metallurgy | 7 | Expired |
| US5043016A | Brown to gray inclusion pigments and method of their production | Chemistry; Metallurgy | 6 | Expired |
| US5254162A | Brown spinel pigments based on zinc chromite, method of their production and use | Chemistry; Metallurgy | 6 | Expired |
| US5569322A | Process for using tantalum (V) nitride as a pigment and the colored products produced thereby | Chemistry; Metallurgy | 6 | Expired |
| US5252125A | Inclusion pigments of zirconium silicate formed with spinel inclusions, a process for the preparation and use thereof | Chemistry; Metallurgy | 5 | Expired |
| US5693102A | Oxonitrides of the formula LnTaON.sub.2 with enhanced brightness and a process for their use | Chemistry; Metallurgy | 5 | Expired |
| US5376349A | Method of producing tantalum (V) nitride | Chemistry; Metallurgy | 4 | Expired |
| US8946102B2 | Copper red frits and pigments comprising silica and at least one of cupric oxide and cuprous oxide | Emerging Cross-Sectional Technologies | 4 | Active |
| US5389402A | Method of producing decorations which are color-stable in a porcelain firing and a pigment composition suitable therefor | Chemistry; Metallurgy | 4 | Expired |
| US5019169A | Gray-black encapsulated pigments and method for their preparation | Chemistry; Metallurgy | 3 | Expired |
| US5021092A | Method for the preparation of gray-green pigments based on zirconium silicate/vanadium compounds and sodium compound | Chemistry; Metallurgy | 3 | Expired |
| US5252126A | Neutral blue zirconium-vanadium pigments | Chemistry; Metallurgy | 2 | Expired |
| US5035746A | Biege-brown encapsulated pigments and method of their production | Chemistry; Metallurgy | 2 | Expired |
| US9334189B2 | Copper red frits and pigments comprising silica and at least one of cupric oxide and cuprous oxide | Emerging Cross-Sectional Technologies | 2 | Active |
| US5330571A | Inclusion pigments of zirconium silicate with included chromic oxide, a process for the preparation and use thereof | Chemistry; Metallurgy | 2 | Expired |
| US6063446A | Process for the production of decorated tableware with increased resistance to scratches caused by cutlery and coloring substance therefor | Chemistry; Metallurgy | 1 | Expired |
| US6103312A | Process for the production of decorated tableware with increased resistance to scratches caused by cutlery | Chemistry; Metallurgy | 1 | Expired |
| US9565772B2 | Method of forming conductive trace | Electricity | 1 | Active |
| US10047004B2 | Method of forming durable glass enamel | Chemistry; Metallurgy | 1 | Active |
| US6174359A | Ceramic decoration coloring substances with increased color saturation comprising zirconium pigments, process for their production and their use | Chemistry; Metallurgy | 1 | Expired |
| US11458755B2 | Printing process for transferring a printing substance | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.