Drill bit
Latest SF DIAMOND CO., LTD. Patents:
- Polycrystalline diamond compact table with polycrystalline diamond extensions therefrom
- POLYCRYSTALLINE DIAMOND COMPOSITE SHEET HAVING RIPPLE-SHAPED GRADIENT LAYER AND PREPARATION METHOD THEREOF
- GRADIENT STRUCTURE CUBIC BORON NITRIDE COMPOSITE SHEET AND PREPARATION METHOD THEREOF
- Polycrystalline diamond compact
- Polycrystalline diamond compact with a raised surface and groove therein
Description
Claims
The ornamental design for a drill bit, as shown and described.
Referenced Cited
U.S. Patent Documents
D264217 | May 4, 1982 | Prause |
D353392 | December 13, 1994 | Winston |
D474213 | May 6, 2003 | Brockett |
D502952 | March 15, 2005 | Achilles |
D587732 | March 3, 2009 | Morozov |
D857067 | August 20, 2019 | Hayakawa |
D908753 | January 26, 2021 | Dunaway |
D911399 | February 23, 2021 | Atkins |
D924949 | July 13, 2021 | Mortensen |
20200087758 | March 19, 2020 | Zhao |
20220017798 | January 20, 2022 | Haijiang |
Patent History
Patent number: D989827
Type: Grant
Filed: Jun 16, 2021
Date of Patent: Jun 20, 2023
Assignee: SF DIAMOND CO., LTD. (Henan)
Inventors: Haijiang Fang (Henan), Yongfeng Wang (Henan), Weifeng Du (Henan)
Primary Examiner: Michael C Stout
Assistant Examiner: Fritzgerald L Butac
Application Number: 29/794,915
Type: Grant
Filed: Jun 16, 2021
Date of Patent: Jun 20, 2023
Assignee: SF DIAMOND CO., LTD. (Henan)
Inventors: Haijiang Fang (Henan), Yongfeng Wang (Henan), Weifeng Du (Henan)
Primary Examiner: Michael C Stout
Assistant Examiner: Fritzgerald L Butac
Application Number: 29/794,915
Classifications
Current U.S. Class:
Cutting Tool, E.g., Drill Bit, Etc. (D15/139)