Quotables
"We are probably nearing the limit of all we can know about astronomy."
Simon Newcomb, astronomer ; 1888
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 |
| 5312991 | Surfactant improvement for para-aminophenol process The compound p-aminophenol is prepared by catalytically hydrogenating nitrobenzene in an acidic reaction medium containing an amine of the formula (I) ##STR1## wherein R represents an alkyl group having from 6 to about 20 carbon atoms; R1 | 05/17/1994 |
| 5312970 | Method of preparing D-propoxyphene D-propoxyphene can be prepared by reacting d-oxyphene and propionic anhydride. Preferably, an excess of propionic anhydride is used. The reaction easily proceeds at temperatures of 70° to 80° C. and produces yields exceeding 95 percent of theory. The fr... | 05/17/1994 |
| 5306507 | Process and composition containing pamabrom and pyrilamine maleate A product and process for preparing a pharmaceutical composition for forming tablets, the composition containing pamabrom and pyrilamine maleate. In preferred embodiments, the composition also contains acetaminophen. A fluid bed granulator is charged with... | 04/26/1994 |
| 5284975 | Method of preparing -d-phenylalkylbenzyl carbinol A method of preparing an -d-phenylalkylbenzyl carbinol by the reaction of a phenylbenzyl ketone with an alkali metal enolate of an amide to form an aldol adduct, which is reduced and purified to form an -d-phenylalkylbenzyl carbinol, wherein... | 02/08/1994 |
| 5254776 | Synthesis of bromobiphenyls Bromobiphenyls (such as 2-fluoro-4-bromobiphenyl) are synthesized by reacting together a phenylboronic acid (such as phenylboronic acid) and a bromoiodobenzene (such as 2-fluoro-4-bromoiodobenzene). The reaction generally takes place with the aid of a cat... | 10/19/1993 |
| 5227526 | Resolution of 3-dimethylamino-2-methylpropiophenone (3-DAMP) In a process for resolving 3-dimethylamino-2-methylpropiophenone (3-DAMP) material, a methanol solution containing a mixture of both 1- and d-enantiomers of 3-DAMP is formed. To this solution, ditoluyl-(L)-tartaric acid or ditoluyl-(D)-tartaric acid is ad... | 07/13/1993 |
| 5104648 | High ibuprofen content granulations A granular pharmaceutical composition containing 85 to 99 percent ibuprofen, 0.9 to 15.0 percent binder, and 0.1 to 5.0 percent polyvinylpyrrolidone, wherein the polyvinylpyrrolidone forms a film with a portion of said binder to form agglomerates, is disc... | 04/14/1992 |
