Herrigel; Howard R.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Herrigel; Howard R..The latest application filed is for "recovery and regeneration of spent mhd seed material by the formate process".
- Herrigel; Howard R. - Seattle WA
| Patent | Date |
|---|---|
| Recovery and regeneration of spent MHD seed material by the formate process Grant 5,057,294 - Sheth , et al. October 15, 1 | 1991-10-15 |
| Method of maintaining adequate seed crystal in preferential precipitation systems Grant 4,618,429 - Herrigel October 21, 1 | 1986-10-21 |
| Prevention of solute deposition fouling in membrane processes Grant 4,207,183 - Herrigel June 10, 1 | 1980-06-10 |
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