Welkener; Ulrich
Patent Applications and Registrations
Patent applications and USPTO patent grants for Welkener; Ulrich.The latest application filed is for "pitch control".
- Welkener; Ulrich - Antwerpen BE
- Welkener; Ulrich - Chester GB2
- Welkener; Ulrich - 2000 Hamburg 74 DE
| Patent | Date |
|---|---|
| Pitch control Grant 5,300,194 - Welkener , et al. April 5, 1 | 1994-04-05 |
| Creping aid Grant 5,234,547 - Knight , et al. August 10, 1 | 1993-08-10 |
| Method for controlling the digestion of pulp by IR spectroscopy Grant 4,743,339 - Faix , et al. May 10, 1 | 1988-05-10 |
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