Schmelz; Helmut
Patent Applications and Registrations
Patent applications and USPTO patent grants for Schmelz; Helmut.The latest application filed is for "catalytic converter for nitrogen oxide reduction in the exhaust gas of an internal combustion engine".
- Schmelz; Helmut - Prien DE
| Patent | Date |
|---|---|
| Catalytic converter for nitrogen oxide reduction in the exhaust gas of an internal combustion engine Grant 5,833,932 - Schmelz November 10, 1 | 1998-11-10 |
| Method and apparatus for metering a reagent into a flowing medium Grant 5,643,536 - Schmelz July 1, 1 | 1997-07-01 |
| Method and apparatus for controlled introduction of a reducing agent into a nitrogen oxide-containing exhaust gas Grant 5,628,186 - Schmelz May 13, 1 | 1997-05-13 |
| Catalyst for reducing nitrogen oxides Grant 5,225,390 - Vogel , et al. July 6, 1 | 1993-07-06 |
| Process utilizing catalytic material for the reduction of nitrous oxides Grant 4,812,296 - Schmelz , et al. March 14, 1 | 1989-03-14 |
| Method for producing films of sintered polycrystalline silicon Grant 4,407,858 - Hanke , et al. October 4, 1 | 1983-10-04 |
| Capacitor dielectric with inner blocking layers and method for producing the same Grant 4,131,903 - Schmelz , et al. December 26, 1 | 1978-12-26 |
| Ceramic dielectric material Grant 4,054,532 - Hanke , et al. October 18, 1 | 1977-10-18 |
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