Famous Patents
William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5024743 | Methylendioxyphenathrene and stilben derivatives, process for the preparation thereof, pharmaceutical compositions using these, and therapeutic applications The present invention provides compounds of the general formula: ##STR1## where R1 is a hydrogen atom or a methoxy or ethoxy radical and R2 and R3 are hydrogen atoms or R2 and R3 together represe... | 06/18/1991 |
| 4859664 | Derivatives of 2,3,4,5,6,7-hexahydro-2,7-methano-1,5-benzoxazonines and -1,4-benzoxazonines, processes for their production and their use as pharmaceuticals New 2,3,4,5,6,7-hexahydro-2,7-methano-1,5-benzoxazonine and -1,4-benzoxazonine compounds of the formula ##STR1## have useful pharmaceutical properites. They are prepared from ketones of the formula ##STR2## via a lactone intermediate. In th... | 08/22/1989 |
| 4855422 | Process for the preparation of azoniaspironortropanol esters A method for preparing azoniaspironotropanol esters, esters thus produced, and methods of use for these is disclosed. The esters are effective as broncholytics and as agents in therapy of asthmatic conditions.... | 08/08/1989 |
| 4780476 | Azoniaspironortropanol esters as asthma therapeutics and broncholytics The present invention is concerned with the use of azoniaspironortropanol esters of the general formula: ##STR1## wherein R signifies one of the following radicals: (a) an alkylene radical of the general formula: ##STR2## in which R3 | 10/25/1988 |
