Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12077730 | Quaternary ammonium hydroxides of polyamines | David C. Lewis, Juventino Uriarte, Hui Zhou, Ke Zhang, Chai Zheng | 2024-09-03 |
| 10472318 | Etheramine compounds | — | 2019-11-12 |
| 10239820 | Etheramine compounds | — | 2019-03-26 |
| 9598358 | Acylalkylisethionate esters and applications in consumer products | Prakasa Rao Anantaneni, John L. Gray, Marty J. Renner, George A. Smith, David C. Lewis +1 more | 2017-03-21 |
| 8008239 | Acylalkylisethionate esters and applications in consumer products | Prakasa Rao Anantaneni, John L. Gray, Marty J. Renner, George A. Smith, David C. Lewis +1 more | 2011-08-30 |
| 5298618 | Macrocyclic oxamides | George P. Speranza, Martin J. Plishka | 1994-03-29 |
| 5247078 | Synthesis of diaza crown ethers | George P. Speranza, Terry L. Renken | 1993-09-21 |
| 5206362 | Two-step method for preparing cyclic ureas | George P. Speranza | 1993-04-27 |
| 5189233 | Process for the production of cyclohexane by liquid phase hydrogenation of benzene | John M. Larkin, James H. Templeton | 1993-02-23 |
| 5179175 | Polyamides from polyetheramines, hexamethylene diamine and adipic acid | George P. Speranza | 1993-01-12 |
| 5171819 | Alkyl substituted piperazines as chain extenders in polyurea elastomer systems | Wei-Yang Su, Dudley J. Primeaux, II | 1992-12-15 |
| 5159101 | Cyanoethylation of alcohols | George P. Speranza | 1992-10-27 |
| 5140090 | Aliphatic polyureas from polyoxyalkylene polyamines, aliphatic diisocyanates and sym-dialkylethylenediamines | George P. Speranza | 1992-08-18 |
| 5140097 | Thermoplastic thermosettable polyamide from poly(oxytetramethylene) diamine and poly(oxytetramethylene) oligomer polyamine | George P. Speranza, Wei-Yang Su, Robert L. Zimmerman | 1992-08-18 |
| 5110991 | Heterogeneous catalyst for alkoxylation of alcohols | George P. Speranza | 1992-05-05 |
| 5103056 | Amidoamines derived from amines with aminopropyl and secondary amine termini | George P. Speranza | 1992-04-07 |
| 5093382 | Preparation of foams using polyfunctional organic acids | George P. Speranza | 1992-03-03 |
| 5082917 | Piperazine derivatives as chain extenders in polyurea elastomer systems and method making same | Wei-Yang Su, Dudley J. Primeaux, II | 1992-01-21 |
| 5053484 | Polyether amide from mixture of polyether diamine | George P. Speranza, Wei-Yang Su | 1991-10-01 |
| 5019653 | Purification of polyamines derived from polyhydroxyl compounds | George P. Speranza | 1991-05-28 |
| 4892959 | Method for the production of N-methylpyrrolidine | John F. Knifton, Wei-Yang Su | 1990-01-09 |