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Class Information
Number: 175/425
Name: Boring or penetrating the earth > Bit or bit element > Specific or diverse material
Description: Apparatus in which the bit or any portion thereof is composed of either (1) two different materials, (2) a single material which has been treated to provide portions of the bit with specific properties which are different from the properties of another portion or (3) a particular material to which significance is attributed.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7357200 |
Earth auger |
Apr. 15, 2008 |
| 7353893 |
Tool with a large volume of a superhard material |
Apr. 8, 2008 |
| 7350600 |
Shirttails for reducing damaging effects of cuttings |
Apr. 1, 2008 |
| 7347292 |
Braze material for an attack tool |
Mar. 25, 2008 |
| 7303030 |
Barrier coated granules for improved hardfacing material |
Dec. 4, 2007 |
| 7264879 |
Composite constructions with oriented microstructure |
Sep. 4, 2007 |
| 7258177 |
Fracture and wear resistant compounds and rock bits |
Aug. 21, 2007 |
| 7240746 |
Bit gage hardfacing |
Jul. 10, 2007 |
| 7216727 |
Drilling bit for drilling while running casing |
May. 15, 2007 |
| 7201237 |
Stabilizing system and methods for a drill bit |
Apr. 10, 2007 |
| 7195736 |
Lead-free steel for machine structural use with excellent machinability and low strength anisotropy |
Mar. 27, 2007 |
| 7182162 |
Shirttails for reducing damaging effects of cuttings |
Feb. 27, 2007 |
| 7100712 |
Method for hardfacing roller cone drill bit legs |
Sep. 5, 2006 |
| 7044243 |
High-strength/high-toughness alloy steel drill bit blank |
May. 16, 2006 |
| 7036614 |
Fracture and wear resistant compounds and rock bits |
May. 2, 2006 |
| 7032693 |
Preformed tooth for tooth bit |
Apr. 25, 2006 |
| 6955233 |
Roller cone drill bit legs |
Oct. 18, 2005 |
| 6948403 |
Bowed crests for milled tooth bits |
Sep. 27, 2005 |
| 6841260 |
Composite constructions with oriented microstructure |
Jan. 11, 2005 |
| 6782958 |
Hardfacing for milled tooth drill bits |
Aug. 31, 2004 |
| 6766870 |
Mechanically shaped hardfacing cutting/wear structures |
Jul. 27, 2004 |
| 6725952 |
Bowed crests for milled tooth bits |
Apr. 27, 2004 |
| 6715567 |
Apparatus and method for forming a pilot hole in a formation |
Apr. 6, 2004 |
| 6696137 |
Woven and packed composite constructions |
Feb. 24, 2004 |
| 6659206 |
Hardfacing composition for rock bits |
Dec. 9, 2003 |
| 6655478 |
Fracture and wear resistant rock bits |
Dec. 2, 2003 |
| 6655481 |
Methods for fabricating drill bits, including assembling a bit crown and a bit body material and integrally securing the bit crown and bit body material to one another |
Dec. 2, 2003 |
| 6607835 |
Composite constructions with ordered microstructure |
Aug. 19, 2003 |
| 6601662 |
Polycrystalline diamond cutters with working surfaces having varied wear resistance while maintaining impact strength |
Aug. 5, 2003 |
| 6585064 |
Polycrystalline diamond partially depleted of catalyzing material |
Jul. 1, 2003 |
| 6454028 |
Wear resistant drill bit |
Sep. 24, 2002 |
| 6454030 |
Drill bits and other articles of manufacture including a layer-manufactured shell integrally secured to a cast structure and methods of fabricating same |
Sep. 24, 2002 |
| 6450271 |
Surface modifications for rotary drill bits |
Sep. 17, 2002 |
| 6451442 |
Composite constructions with oriented microstructure |
Sep. 17, 2002 |
| 6405723 |
Suction tool |
Jun. 18, 2002 |
| 6375706 |
Composition for binder material particularly for drill bit bodies |
Apr. 23, 2002 |
| 6360832 |
Hardfacing with multiple grade layers |
Mar. 26, 2002 |
| 6361873 |
Composite constructions having ordered microstructures |
Mar. 26, 2002 |
| 6220117 |
Methods of high temperature infiltration of drill bits and infiltrating binder |
Apr. 24, 2001 |
| 6196338 |
Hardfacing rock bit cones for erosion protection |
Mar. 6, 2001 |
| RE37006 |
High flow weld-in nozzle sleeve for rock bits |
Jan. 2, 2001 |
| 6148936 |
Methods of manufacturing rotary drill bits |
Nov. 21, 2000 |
| 6138780 |
Drag bit with steel shank and tandem gage pads |
Oct. 31, 2000 |
| 6138779 |
Hardfacing having coated ceramic particles or coated particles of other hard materials placed on a rotary cone cutter |
Oct. 31, 2000 |
| 6135218 |
Fixed cutter drill bits with thin, integrally formed wear and erosion resistant surfaces |
Oct. 24, 2000 |
| 6109377 |
Rotatable cutting bit assembly with cutting inserts |
Aug. 29, 2000 |
| 6102142 |
Drilling tool with shock absorbers |
Aug. 15, 2000 |
| 6098731 |
Drill bit compact with boron or beryllium for fracture resistance |
Aug. 8, 2000 |
| 6063502 |
Composite construction with oriented microstructure |
May. 16, 2000 |
| 6050354 |
Rolling cutter bit with shear cutting gage |
Apr. 18, 2000 |
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