patent number

Tom bates

IN the aug 2006, PM maginzine, in the artical "dead men days" you list march 31sy - in 1891 a patent was granted for a coal slurry system. Does any one have the patent number for it. Thanks - Tom

Just a HO

visit www.uspto.gov

I haven't seen the article, but a quick patent search at www.uspto.gov (for the terms "coal slurry" and "1891") yielded this list:

PAT. NO. Title

5,513,583 Coal water slurry burner assembly

5,380,342 Method for continuously co-firing pulverized coal and a coal-water slurry

5,182,343 Homopolymers of sulfonated isoprene and 1,3-butadiene and agents containing the same

4,678,562 Promotors for froth floatation of coal

4,678,561 Promoters for froth flotation of coal

4,589,980 Promoters for froth flotation of coal

4,461,625 Methods of cleaning coal

4,447,245 Methods of cleaning coal

4,265,737 Methods and apparatus for transporting and processing solids

4,244,699 Treating and cleaning coal methods

4,224,039 Coal briquetting methods

4,205,929 Slurry transport medium

4,178,233 Fluorinated hydrocarbons in coal mining and beneficiation

4,178,231 Method and apparatus for coal separation using fluorinated hydrocarbons

4,173,530 Methods of and apparatus for cleaning coal

The patent numbers begining with a "4" are older than the "5"s. If you go to uspto.gov the patents can be quickly pulled up by the listed patent number.

Unknown

there go

There go my inventions...