Invention Grant
- Patent Title: Solar heat-reflective roofing granules, solar heat-reflective shingles and process for producing the same
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Application No.: US16394963Application Date: 2019-04-25
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Publication No.: US11053684B2Publication Date: 2021-07-06
- Inventor: Ming Liang Shiao , Tihana Tresler , Husnu M. Kalkanoglu , Walter T. Stephens
- Applicant: CertainTeed LLC
- Applicant Address: US PA Malvern
- Assignee: CertainTeed LLC
- Current Assignee: CertainTeed LLC
- Current Assignee Address: US PA Malvern
- Agency: McDonnell Boehnen Hulbert & Berghoff LLP
- Main IPC: C04B35/64
- IPC: C04B35/64 ; C04B33/04 ; E04D1/20 ; C04B33/32 ; C04B35/10 ; C04B35/18 ; C04B35/626 ; C04B35/636 ; C03C10/00 ; E04D1/16 ; E04D1/00
Abstract:
A process for preparing roofing granules includes forming kaolin clay into green granules and sintering the green granules at a temperature of at least 900 degrees Celsius to cure the green granules until the crystalline content of the sintered granules is at least ten percent as determined by x-ray diffraction.
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