Issued Patents 1989
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880934 | Preparation of hydroxyalkylpiperazinones by reacting a 2,3-dihydroxy-1,4-dioxane with a hydroalkyldiamine | John M. Motes | 1989-11-14 |
| 4871848 | Compositions prepared from hydrocarbyl substituted nitrogen-containing aromatic heterocyclic compounds, an aldehyde and/or ketone and an amine | Robert G. Martinez | 1989-10-03 |
| 4861884 | Compositions prepared from amino substituted pyrazines and carboxylic acids, carboxylic acid anhydrides, carboxylic acid esters or carboxylic acid halides | — | 1989-08-29 |
| 4847355 | Thermosettable prepolymer prepared from heterocyclic material having alkyl substituents, mono- or dianhydride, ethylenically unsaturated material and a hydroxide, carbonate of bicarbonate of a metal of groups I-A or II-A | — | 1989-07-11 |
| 4837324 | Process for the reaction of piperazine, and derivatives thereof, with glyoxal, and derivatives thereof | — | 1989-06-06 |
| 4837323 | Corrosion inhibitors | Robert G. Martinez, Terry W. Glass | 1989-06-06 |
| 4831137 | Reaction products of pteridine and 4-isopropenyl-1-cyclohexene-1-carboxaldehyde | — | 1989-05-16 |
| 4814447 | Preparation of hydroxyalkylpiperazinones by reacting an alkylene oxide with decahydropyrazino[2,3-b]pyrazine or its substituted derivatives | — | 1989-03-21 |
| 4814443 | Preparation of hydroxyalkylpiperazinones by reacting glyoxal with hydroxyalkyldiamines | John M. Motes | 1989-03-21 |
| 4812531 | Thermosettable polymers or prepolymers prepared from heterocyclic materials having alkyl substituents, mono- or dianhydrides, ethylenically unsaturated materials and a hydroxide, carbonate or bicarbonate of a metal of groups I-A or II-A | — | 1989-03-14 |