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 |
| 6946482 | Motilide compounds Motilide compounds having the formula (I), wherein R1, R2, R3, and R4 are as defined herein, and methods for their preparation and use in the treatment of diseases or conditi... | 09/20/2005 |
| 5928613 | Apparatus for acetylating cellulose In a production process of a cellulose acetate which comprises (a) a reduced pressure-acetylation step of acetylating a cellulose under a reduced pressure in the presence of sulfuric acid or other acidic catalyst, with distilling off a gaseous phase compo... | 07/27/1999 |
| 5869646 | Method and apparatus for acetylating cellulose In a production process of a cellulose acetate which comprises (a) a reduced pressure-acetylation step of acetylating a cellulose under a reduced pressure in the presence of sulfuric acid or other acidic catalyst, with distilling off a gaseous phase compo... | 02/09/1999 |
| 5770726 | Process for preparing a cellllose acetoacetate alkanoates The present invention relates to a process for preparing a substituted cellulose acetoacetate alkanoate without using a carboxamide/lithium chloride solvent system. The process involves contacting cellulose in a carboxylic acid diluent with an acetylating... | 06/23/1998 |
| 5608050 | Process for the manufacture of cellulose acetate The specification discloses a process for the manufacture of cellulose acetate. The process reacts, at a temperature suitable for acetylation, an acetic acid activated pretreated cellulose raw material containing 100 parts cellulose by dry weight, and 0.5... | 03/04/1997 |
| 5294703 | Process for preparing -D-cellobiose octaacetate Provided is a novel improved process for the preparation of -D-cellobiose octaacetate via the acetylative degradation of cellulose or cellulose acetate. The title compound is provided in high yield and quality in a facile one-pot process, amenable ... | 03/15/1994 |
| 4697007 | Preparation of microcrystalline triacetylcellulose The preparation of microcrystalline triacetylcellulose by acid-catalyzed acetylation of microcrystalline cellulose, perfluoroalkanesulfonic acids with 1 to 8 carbon atoms are used as the catalyst, resulting in a non-hazardous process and high yields of ex... | 09/29/1987 |
| 4590266 | Process for preparing cellulose acetate Cellulose acetate is effectively prepared from cellulose and acetic anhydride in a solvent of acetic acid in the presence of a catalyst of sulfuric acid, when the reaction system is being evacuated at least before the reaction mixture reaches a boiling po... | 05/20/1986 |
| 4480090 | Process for esterification of cellulose using as the catalyst the combination of sulfuric acid, phosphoric acid and a hindered aliphatic alcohol The present invention relates to a method of preparing lower fatty acid esters of cellulose which comprises esterifying at a temperature of between about 75° C. and about 110° C. a cellulose compound having esterifiable hydroxyl groups with an esterifyi... | 10/30/1984 |
| 4439605 | Process for producing cellulose acetate A process for producing cellulose diacetate is disclosed which comprises the steps of: (a) pretreating and activating 100 parts by weight of cellulose, adding a mixture of 200 to 400 parts of acetic anhydride, 0 to 350 parts of glacial acetic acid, and 0.... | 03/27/1984 |
| 4306060 | Process for preparation of cellulose acetate Cellulose acetate is prepared acetylating cellulose at a high temperature of 50°-85° C. and then ripening the acetylated cellulose at a high temperature of 110°-120° C.... | 12/15/1981 |
