FACTOID # 8: Bookworms: Vermont has the highest number of high school teachers per capita and third highest number of librarians per capita.
 
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Class 518: CHEMISTRY: FISCHER-TROPSCH PROCESSES; OR PURIFICATION OR RECOVERY OF PRODUCTS THEREOF / U.S. Patent ... (1356 words)
For the purpose of purification or recovery of a Fischer-Tropsch process product, Class 518 provides for any physical process required, but only two chemical processes are provided for, i.e., hydrogenation with gaseous hydrogen and formation of oximes of the oxygen containing products.
Class 518 is superior to these classes when compounds normally classified in them are formed by a Fischer-Tropsch reaction or are separated from the reaction mixture by any physical process or by one of the two chemical processes stated in (4) Note.
Patents having both types of claims are classified as originals in Class 518 and cross-referenced to the appropriate compound class or classes.
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