The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 06, 2021
Filed:
Apr. 25, 2019
Applicant:
Certainteed Llc, Malvern, PA (US);
Inventors:
Ming Liang Shiao, Collegeville, PA (US);
Tihana Tresler, Derry, NH (US);
Husnu M. Kalkanoglu, Swarthmore, PA (US);
Walter T. Stephens, Cleveland, OH (US);
Assignee:
CertainTeed Corporation, Malvern, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
C04B 35/64 (2006.01); C04B 33/04 (2006.01); E04D 1/20 (2006.01); C04B 33/32 (2006.01); C04B 35/10 (2006.01); C04B 35/18 (2006.01); C04B 35/626 (2006.01); C04B 35/636 (2006.01); C03C 10/00 (2006.01); E04D 1/16 (2006.01); E04D 1/00 (2006.01);
U.S. Cl.
CPC ...
E04D 1/20 (2013.01); C03C 10/00 (2013.01); C04B 33/04 (2013.01); C04B 33/32 (2013.01); C04B 35/10 (2013.01); C04B 35/18 (2013.01); C04B 35/62695 (2013.01); C04B 35/636 (2013.01); C04B 35/64 (2013.01); E04D 1/16 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/349 (2013.01); C04B 2235/528 (2013.01); C04B 2235/5427 (2013.01); C04B 2235/5436 (2013.01); C04B 2235/5463 (2013.01); C04B 2235/5472 (2013.01); C04B 2235/5481 (2013.01); C04B 2235/95 (2013.01); C04B 2235/9646 (2013.01); C04B 2235/9661 (2013.01); E04D 2001/005 (2013.01); Y02A 30/254 (2018.01); Y02B 80/00 (2013.01); Y10T 428/24413 (2015.01); Y10T 428/24421 (2015.01);
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.