Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5493067 | Solid superacid alkylation catalyst compositions and alkylation method using the same | Elmer J. Hollstein, Chao-Yang Hsu | 1996-02-20 |
| 5491278 | Alkylation process using solid superacid catalyst liquid phase | Elmer J. Hollstein, Chao-Yang Hsu | 1996-02-13 |
| 5321197 | Processes using solid-acid catalyst composition | Elmer J. Hollstein, Chao-Yang Hsu | 1994-06-14 |
| 5310868 | Processes using solid-acid catalyst compositions | Elmer J. Hollstein, Chao-Yang Hsu | 1994-05-10 |
| 5214017 | Solid-acid alkylation catalyst compositions for alkylation processes | Elmer J. Hollstein, Chao-Yang Hsu | 1993-05-25 |
| 5212136 | Solid-acid alkylation catalyst compositions for alkylation processes | Elmer J. Hollstein, Chao-Yang Hsu | 1993-05-18 |
| 4769161 | Silicate-containing oil recovery compositions | — | 1988-09-06 |
| 4743385 | Oil recovery agent | Donald F. Rugen, John L. Cayias | 1988-05-10 |
| 4699214 | Salt-tolerant alkyl aryl sulfonate compositions for use in enhanced oil recovery processes | — | 1987-10-13 |
| 4682653 | Steam recovery processes employing stable forms of alkylaromatic sulfonates | — | 1987-07-28 |
| 4320032 | Catalyst for hydrogenation of aromatic dinitriles | — | 1982-03-16 |
| 4247478 | Process and catalyst for hydrogenation of aromatic dinitriles | — | 1981-01-27 |
| RE30464 | Ammoxidation process | Jack D. Tinkler, Richard V. Norton, Ronald D. Bushick | 1980-12-30 |
| 4222961 | Process for hydrogenating aromatic dinitriles | Walter A. Butte, Jr., William J. Murtaugh | 1980-09-16 |
| 4182909 | Polymeric catalyst composition for hydrocarbon oxidation | John Bare | 1980-01-08 |
| 4181680 | Hydrogenation of aromatic amines | Walter A. Butte, Jr. | 1980-01-01 |