Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6037286 | UV absorbing container glass compositions | Steven M. Weiser, James E. Fenstermacher, Robert N. Clark | 2000-03-14 |
| D348963 | Golf shoe cleat cleaner | — | 1994-07-19 |
| 4933307 | Silica-rich porous substrates with reduced tendencies for breaking or cracking | William P. Marshall, Herbert W. Barch, Roy D. Hegedus, Walter J. Robertson | 1990-06-12 |
| 4853001 | Porous inorganic siliceous-containing gas enriching material and process of manufacture and use | — | 1989-08-01 |
| 4842620 | Process of gas enrichment with porous siliceous-containing material | Walter J. Robertson, William P. Marshall, Herbert W. Barch, Balbhadra Daas, Michael A. Smoot +1 more | 1989-06-27 |
| 4298370 | Method of improving glass melting by ablation enhancement | — | 1981-11-03 |
| 4282023 | Glass melting enhancement by toroidal batch shaping | John Devin MacKenzie | 1981-08-04 |
| 4270945 | Method of melting flat glass using nitrates to suppress sulfurous emissions | Alan G. Amrhein, Larry J. Shelestak | 1981-06-02 |