Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7354733 | Method for sorting and separating living cells We disclose methods of sorting or separating mixtures of living cells (e.g., eukaryotic, prokaryotic, mammalian, pathogenic, bacterial, viral, etc.). We perform our methods by activating cell-selective photophoric labels, which photosensitize and chemically reduce a... | 04/08/2008 |
| 5620569 | Process for the photooxidation of terpene olefins In the photooxidation of terpene olefins, fewer by-products and higher conversion rates are obtained if a very high irradiation intensity is chosen.... | 04/15/1997 |
| 5304291 | Method of preparing 9beta, 10alpha-5,7-diene steroids The invention relates to a method of preparing a 9beta,10alpha-5,7-diene steroid by irradiating the corresponding 9alpha,10beta-5,7-diene steroid with filtered ultraviolet light from an indium lamp.... | 04/19/1994 |
| 5120412 | Preparation of hypericin A process for preparing hypericin comprises oxidative dimerization of emodin anthrone and conversion of the intermediate protohypericin to hypericin by irradiation with visible light.... | 06/09/1992 |
| 5098535 | Process for preparing 14--hydroxy-4-androstene-3,6,17-trione A process for the preparation in high yield of 14-hydroxy-4-androstene-3,6,17-trione which has an aromatase inhibition activity and is useful as an antitumor agent, in which the 6ଲ-hydroxyl group of 6ଲ, 14-dihydroxy-4-andros... | 03/24/1992 |
| 4676880 | Photolysis of lactones The photochemical decarbonylation of lactones and the method of detecting microquantities of ,-diarylglycolate esters comprising an acidic reaction mixture containing the esters and naphthols producing a lactone, decarbonylating the lactone ... | 06/30/1987 |
| 4601855 | Method of preparing 9ଲ, 10-5,7-diene steroids The invention relates to the preparation of 9ଲ,10-5,7-diene steroids by irradiating the corresponding 9,10ଲ steroids with filtered ultraviolet light of an antimony lamp.... | 07/22/1986 |
| 4551214 | Photochemical preparation of previtamin D Compounds of the formula ##STR1## wherein R1 -R4 is hydrogen or chlorine, R5 is --COOMe or --SO3 Me, Me is an alkali metal cation and X is oxygen, sulfur or selenium, photosensitizers for the conversion of ... | 11/05/1985 |
| 4525255 | Photochemical reactions for commercial synthesis Photochemical reactions are conducted using floating polymer beads on the surface of a moving body of water. The polymer bead is impregnated with a reactant, floated on the water in direct sunlight so as to expose the reactant to solar radiation, collecte... | 06/25/1985 |
| 4490226 | Efficient photochemical formation of 1--hydroxyprevitamin D3 An improved method is set out for converting a reactant having a reactant core portion, 5,7-androstadiene-1,3ଲ-diol, into a product having a product core portion, 9,10-seco-5(10),6,8-androstatriene-1,3ଲ-diol. The core portio... | 12/25/1984 |
| 4461687 | Processes for the preparation of pure enantiomers of bicyclo(2,2,2)oct-5-en-2-ones New bicyclo[2.2.2]oct-5-en-2-ones of the formulae Ia and Ib in the form of pure enantiomers and processes for preparing them are described. The compounds are used for the preparation of pure enantiomers of the formula V by sensitized photoreaction or of p... | 07/24/1984 |
| 4450059 | Photochemical decarboxylation of a metal salt of an alpha-hydroxy carboxylic acid A process is provided for the photochemical decarboxylation of a metal salt of an alpha-hydroxy carboxylic acid to form the corresponding alcohol wherein the alpha-hydroxy carboxylic acid metal salt is exposed to light in the absence of a photosensitizing... | 05/22/1984 |
| 4257858 | Photochemical method for producing biocidal 2-aryl-1,3-cyclohexanedione compounds 2-Aryl-1,3-cyclohexanedione compounds and their alkali metal and ammonium salts exhibit outstanding herbicidal, miticidal and mite ovicidal activity.... | 03/24/1981 |
| 4242186 | Low pressure tritiation of molecules Molecules are tritiated by depositing molecules of a substance to be tritiated on a supporting substrate in a vacuum chamber, and then subjecting the substance to low pressures of tritium gas. In a second embodiment of the invention, a substance is tritia... | 12/30/1980 |
| 4201638 | Triple ions of 1,2- and 1,4-dicarbonyl compounds and analogs thereof containing nitrogen and containing two strategic oxygen or nitrogen groups and process for producing same Stable paramagnetic alkali radical cationic triple ions of selected 1,2 and 1,4 dicarbonyl compounds and their nitrogen-containing analogs have been produced by both conventional alkali metal reduction of an appropriate organic compound and by a novel pro... | 05/06/1980 |
| 4149015 | Substituted benzopinacols Benzopinacols represented by the formula: ##STR1## wherein R1 is hydrogen, alkyl or aryl; R2 and R6 independently are selected from the group consisting of hydrogen, halogen or trifluoromethyl; R3 and R5 | 04/10/1979 |
| 4001096 | Process for preparing 25-hydroxycholecalciferol intermediates A method for preparing 9ଲ, 10-cholesta-5,7-diene-3ଲ,25 diol and 25-hydroxyprevitamin D3 by irradiation.... | 01/04/1977 |
| 4000050 | Photochemical preparation of polycycloalkyl oxyalkanes and oxyalkenes Processes and compositions are described for altering the aroma of consumable products including perfumes, perfume compositions and perfumed articles utilizing as the essential ingredient one or more of the polycycloalkyl oxyalkanes and/or oxyalkenes (bro... | 12/28/1976 |
| 3994675 | Chemical storage of radiant energy A system for the chemical storage of radiant energy in which either: A. 1,8-diaryl-1a,2,7,7a-tetrahydro-1,2,7-metheno-1H-cyclopropa[b]naphthalenes (1) are converted on heating to 1,2-diaryl-2a,8b-dihydrocyclobuta[a]naphthalenes (2) or 8,9-diaryl-benz... | 11/30/1976 |
| 3932515 | Novel oxygenated derivatives of thujopsene There are provided novel oxygenated pentamethyldecalins and dehydro derivatives thereof which are lasting odorants of woody character and which are useful in the perfumery art. These novel compounds are prepared by oxidation of cis-thujopsene and cis-dihy... | 01/13/1976 |
| 3932516 | Novel oxygenated derivatives of thujopsene There are provided novel oxygenated pentamethyldecalins and dehydro derivatives thereof which are lasting odorants of woody character and which are useful in the perfumery art. These novel compounds are prepared by oxidation of cis-thujopsene and cis-dihy... | 01/13/1976 |
