Issued Patents All Time
Showing 26–50 of 63 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820817 | Process for preparing 3-substituted-6-substituted-7-oxo-1-azabicycl(3.2.0)-hept-2-ene-2-carbox ylic acid | Burton G. Christensen | 1989-04-11 |
| 4783453 | 2-aza-substituted 1-carbadethiapen-2-em-3-carboxylic acids | Burton G. Christensen, John C. Chabala | 1988-11-08 |
| 4782051 | 2-aza-substituted 1-carbadethiapen-2-em-3 carboxylic acids | Burton G. Christensen, John C. Chabala | 1988-11-01 |
| 4748162 | 6-substituted-2-carbaminidoyl-pen-2-em-3-carboxylic acids | William J. Leanza, Burton G. Christensen, Frank P. DiNinno | 1988-05-31 |
| 4745188 | Process for preparing 3-substituted-6-substituted-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carbox ylic acid | Burton G. Christensen | 1988-05-17 |
| 4739048 | Process for the preparation of thienamycin and intermediates | Burton G. Christensen, Thomas N. Salzmann | 1988-04-19 |
| 4736025 | Process for the preparation of thienamycin and intermediates | Burton G. Christensen, Thomas N. Salzmann | 1988-04-05 |
| 4729993 | Carbapenems and 1-methylcarbapenems having an externally alkylated mono- or bicyclic 2-quaternary heteroarylalkyl substituent | Burton G. Christensen, James V. Heck, Thomas N. Salzmann, David H. Shih | 1988-03-08 |
| 4725594 | Carbapenems having an internally or externally alkylated mono- or bicyclic 2-quaternary heteroarylalxyl heteromethyl substituent | Burton G. Christensen, James V. Heck, Thomas N. Salzmann | 1988-02-16 |
| 4707547 | Process for preparing carbapenem compounds | Burton G. Christensen | 1987-11-17 |
| 4675317 | 2-unsaturated alkylthio-pen-2-em-3-carboxylic acids | Frank P. DiNinno, William J. Leanza, David A. Muthard | 1987-06-23 |
| 4650794 | 6-(1-hydroxyethyl)-2-carbamimidoyl-pen-2-em-3-carboxylic acids | Burton G. Christensen, Frank P. DiNinno, William J. Leanza | 1987-03-17 |
| 4610820 | Process for the preparation of thienamycin and intermediates | Burton G. Christensen, Thomas N. Salzmann | 1986-09-09 |
| 4610823 | Process for preparing substituted 2-thioxopenams and 2-substituted thiopenems | Frank P. DiNinno, William J. Leanza | 1986-09-09 |
| 4530841 | 6- And 6,6-disubstituted-3-substituted amino-1-azabicyclo-[3.2.0]hept-2-en-7-one-2-carboxylic acid | Burton G. Christensen | 1985-07-23 |
| 4424230 | 6-(1'-Hydroxyethyl)-3-substituted amino-1-azabicyclo-3.2.0!hept-2-en-7-one-2-carboxylic acid | Burton G. Christensen | 1984-01-03 |
| 4400323 | 3-[1-Hydroxyethyl]-4-carboxymethyl-azetidin-2-one | Burton G. Christensen, Thomas N. Salzmann | 1983-08-23 |
| 4388310 | 6-Amido-2-S-oxides of substituted 2-organothio-pen-2-em-3-carboxylic acids | Burton G. Christensen, Frank P. DiNinno, David A. Muthard | 1983-06-14 |
| 4383946 | Process for the preparation of 1-carbapenems and intermediates via silyl-substituted dithioacetals | Burton G. Christensen, Thomas N. Salzmann | 1983-05-17 |
| 4378315 | Process for the preparation of thienamycin and intermediates | Burton G. Christensen, Thomas N. Salzmann | 1983-03-29 |
| 4369187 | 3-Substituted-1-azabicyclo[3.2.0]hept-2-en-7-one-2-carboxylic acid | Burton G. Christensen | 1983-01-18 |
| 4361512 | 2-Substituted thio-6-substituted-carbapen-2-em-3-carboxylic acids | — | 1982-11-30 |
| 4357342 | 1-Azabicyclo[3.2.0]heptan-3,7-dione-2-carboxylic acid | Burton G. Christensen | 1982-11-02 |
| 4356120 | 3-(1-Hydroxyethyl)-4-(but-2-ene)-azetidin-2-one and derivatives | Burton G. Christensen, Thomas N. Salzmann | 1982-10-26 |
| 4318912 | 6-(1-Hydroxyethyl)-3-substituted-1-azabicyclo(3.2.0)-hept-2-en-7-one-2-ca rboxylic acid | Burton G. Christensen | 1982-03-09 |