Cawston; John F.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Cawston; John F..The latest application filed is for "metal ion free photoresist developer composition with lower alkyl quaternary ammonium hydrozide as alkalai agent and a quaternary ammonium compound as surfactant".
- Cawston; John F. - Winchester MA
| Patent | Date |
|---|---|
| Metal ion free photoresist developer composition with lower alkyl quaternary ammonium hydrozide as alkalai agent and a quaternary ammonium compound as surfactant Grant 4,628,023 - Cawston , et al. December 9, 1 | 1986-12-09 |
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