Issued Patents All Time
Showing 51–75 of 93 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5010179 | Process for the preparation of mixed, symmetrical azonitrile dicarboxylic dicyano acids and initiators | — | 1991-04-23 |
| 5010177 | Process for the preparation of an azonitrile dicarboxylic acid initiator in acetone having a low salt and low water content | Deborah S. Filla | 1991-04-23 |
| 5010178 | Process for the preparation of mixed azonitrile carboxylic acid initiators | — | 1991-04-23 |
| 4929653 | Stabilized pigmented polypropylene fiber resistant to gas fade | George Kletecka, Pyong-Nae Son | 1990-05-29 |
| 4920228 | N,N-disubstituted, .alpha.-(3,5-dialkyl-4-hydroxyphenyl)-.alpha.,.alpha.-disubstituted acetamides and composition stabilized therewith | Pyong-Nae Son | 1990-04-24 |
| 4914232 | Polysubstituted 2-morpholones, related compounds, processes for their preparation, and U-V light stabilized compositions | — | 1990-04-03 |
| 4841053 | Process for desensitizing a 1-(alkylamino)alkyl-polysubstituted piperazinone during recovery | Pyong-Nae Son, Charles P. Jacobs, Ronald M. Kovach | 1989-06-20 |
| 4797438 | Stabilized gamma-irradiated polypropylene and sterilizable articles thereof | George Kletecka, Pyong-Nae Son | 1989-01-10 |
| 4780495 | N -(substituted)-.alpha.-(3,5-dialkyl-4-hydroxyphenyl)-.alpha.,.alpha.-disu bstituted acetamides, and composition stabilized therewith | Pyong-Nae Son | 1988-10-25 |
| 4762872 | Oligomeric light stabilizers with substituted piperidine ends | Pyong Nae-Son | 1988-08-09 |
| 4722806 | Alkylated polyalkylenepolyamines, substituted oxo-piperazinyl-triazines and UV light stabilized compositions | Pyong-Nae Son | 1988-02-02 |
| 4711957 | Synthesis of 2-keto-1,4-diazacycloalkanes | — | 1987-12-08 |
| 4698446 | Synthesis of polyamines and mixture formed thereby, of diprimary polyalkylene polyamines with disubstituted N-adjacent terminal carbon atom(s) | Pyong-Nae Son | 1987-10-06 |
| 4692487 | 1,2-ethanediyl-bis-2-piperazinone esters, oligomers thereof, and compositions stabilized thereby | Pyong-Nae Son | 1987-09-08 |
| 4675353 | Hindered 2-keto-1,4-diazacycloalkane oligomers containing triazine rings and compositions stabilized thereby | Pyong-Nae Son | 1987-06-23 |
| 4650903 | Oligomeric amides as synergists for antioxidants and UV stabilizers | Pyong-Nae Son | 1987-03-17 |
| 4639479 | Polyalkylenepolyamine having pendant substituted oxo-piperazinyltriazines and UV light stabilized compositions | Pyong-Nae Son | 1987-01-27 |
| 4629752 | Substituted oxo-piperazinyl-triazines and UV light stabilized compositions | Robert W. Layer, Pyong-Nae Son | 1986-12-16 |
| 4601839 | Stabilized polymers, novel stabilizers, and synthesis thereof | — | 1986-07-22 |
| 4547538 | Alkylated polyalkylenepolyamines, substituted oxo-piperazinyl-triazines and UV light stabilized compositions | Pyong-Nae Son | 1985-10-15 |
| 4528370 | Polysubstituted 2-morpholones | — | 1985-07-09 |
| 4523032 | 3,5-Dialkyl-4-hydroxyphenyl-substituted acetic acids | — | 1985-06-11 |
| 4500662 | Polysubstituted .alpha.-aminoacetamides | — | 1985-02-19 |
| 4496772 | Preparation of nitroalcohols | — | 1985-01-29 |
| 4480092 | Alkylated polyalkylenepolyamines, substituted oxo-piperazinyl-triazines | Pyong-Nae Son | 1984-10-30 |