Shaffer; Mary E.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Shaffer; Mary E..The latest application filed is for "method for preparation of wc-ni grade powder".
- Shaffer; Mary E. - Towanda PA
| Patent | Date |
|---|---|
| Method for preparation of WC-NI grade powder Grant 5,057,147 - Shaffer , et al. October 15, 1 | 1991-10-15 |
| Method of producing monotungsten carbide powder Grant 4,664,899 - Kimmel , et al. May 12, 1 | 1987-05-12 |
| Process for producing refractory powder Grant 4,478,888 - Benjamin , et al. October 23, 1 | 1984-10-23 |
| Process for producing refractory powder Grant 4,456,484 - Benjamin , et al. June 26, 1 | 1984-06-26 |
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