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Porositization Process of Carbon or Carbonaceous Materials
Patent relating to porositized carbon processed from carbon or carbonaceous materials.
Date:
March 14, 2014
Creator:
Shi, Sheldon Q. & Xia, Changlei
System:
The UNT Digital Library
Drill Bit
Patent for drill bit, adapted for use in boring (or drilling) of oil wells with bit shank and enlarged head of angularly mounted rotary cutters (for outward cutting of well walls).
Date:
January 3, 1922
Creator:
Thomas, Martin E.
System:
The Portal to Texas History