Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7432508 | Gas measurement system | Rich H. Daniels, John R. DelFavero, Raymond Davis, Anthony T. Pierry, James T. Russell | 2008-10-07 |
| 4981964 | Oligomeric polyesters and polyamides containing dipiperidyl triazine groups | John F. Stephen | 1991-01-01 |
| 4889882 | Tetramethyl piperidyl terminated triazine oligomeric esters and amides | John F. Stephen | 1989-12-26 |
| 4883831 | Melamine-based light stabilizers for plastics | John F. Stephen | 1989-11-28 |
| 4883860 | Triazine-based light stabilizers for plastics | John F. Stephen | 1989-11-28 |
| 4851461 | Tetraalkyl piperidylated stabilizers for plastics | John F. Stephen | 1989-07-25 |
| 4804699 | Monomeric and oligomeric glutarate-based light stabilizers for plastics | John F. Stephen | 1989-02-14 |
| 4786750 | Pentene derivatives | John F. Stephen | 1988-11-22 |
| 4710527 | Malonate-based light stabilizers for plastics | John F. Stephen | 1987-12-01 |
| 4709063 | Preparation of 2-halo-5-methylpyridines from 4-methyl-4-pentene derivatives | John F. Stephen | 1987-11-24 |
| 4701485 | Malonate-based light stabilizers for plastics | John F. Stephen | 1987-10-20 |
| 4690963 | Tartrate-based light stabilizers for plastics | John F. Stephen | 1987-09-01 |
| 4689360 | Oligomeric malonate-based light stabilizers for plastics | John F. Stephen | 1987-08-25 |
| 4687800 | Tartrate-based light stabilizers for plastics | John F. Stephen | 1987-08-18 |
| 4676308 | Down-hole gas anchor device | Robert Chow | 1987-06-30 |
| 4628096 | Preparation of 2-halo-5-methylpyridines from 4-methyl-4-pentene derivatives | John F. Stephen | 1986-12-09 |
| 4504664 | 2-Piperidones | John F. Stephen | 1985-03-12 |