Invention Grant
- Patent Title: Method of manufacturing colored chalk
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Application No.: US16173024Application Date: 2018-10-29
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Publication No.: US11225579B2Publication Date: 2022-01-18
- Inventor: Duane Hoffman
- Applicant: Duane Hoffman
- Applicant Address: US CA Shasta Lake
- Assignee: Duane Hoffman
- Current Assignee: Duane Hoffman
- Current Assignee Address: US CA Shasta Lake
- Agency: Boudwin Intellectual Property
- Agent Daniel Boudwin
- Main IPC: C09D11/00
- IPC: C09D11/00 ; C09C1/24 ; C09D13/00 ; C09C1/00 ; C09C1/02 ; C09D1/00 ; C09D4/00 ; C09D5/00 ; C09K3/00 ; C09C3/00 ; C09C3/08 ; C09C3/06

Abstract:
A method of manufacturing colored chalk. The method for manufacturing colored chalk includes preparing a colorant, combining the colorant with a volume of water, adding magnesium carbonate to the combination of water and colorant until a paste is formed, mixing the paste until the paste is homogenous, heating the paste in a kiln until the water is removed, and grinding a mass of colored magnesium carbonate into a powder having a desired fineness. In some embodiments, the colorant includes iron oxide, charcoal, or Camellia sinensis leaves.
Public/Granted literature
- US20190136068A1 Method of Manufacturing Colored Chalk Public/Granted day:2019-05-09
Information query
IPC分类: