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:
Jan. 26, 2016
Filed:
Aug. 26, 2014
Applicant:
Certainteed Corporation, Valley Forge, PA (US);
Inventors:
Husnu M. Kalkanoglu, Swarthmore, PA (US);
Keith C. Hong, Lititz, PA (US);
Joong Youn Kim, Newtown Square, PA (US);
Ming Liang Shiao, Collegeville, PA (US);
Assignee:
CertainTeed Corporation, Malvern, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 5/16 (2006.01); B05D 7/00 (2006.01); E04D 13/00 (2006.01); C09C 1/00 (2006.01); A01N 25/12 (2006.01); A01N 25/26 (2006.01); A01N 59/16 (2006.01); A01N 59/20 (2006.01); C09D 5/14 (2006.01); E04D 5/12 (2006.01); E04D 1/00 (2006.01);
U.S. Cl.
CPC ...
E04D 13/002 (2013.01); A01N 25/12 (2013.01); A01N 25/26 (2013.01); A01N 59/16 (2013.01); A01N 59/20 (2013.01); C09C 1/00 (2013.01); C09D 5/14 (2013.01); E04D 1/00 (2013.01); E04D 5/12 (2013.01); E04D 2001/005 (2013.01); Y10T 428/24372 (2015.01); Y10T 428/2991 (2015.01); Y10T 428/2993 (2015.01); Y10T 428/2998 (2015.01); Y10T 428/31815 (2015.04);
Abstract
Time-release algae-resistant roofing granules have a base particle including an algaecide and an outer coating layer including another algaecide. The at least two algaecides are released over different predetermined periods. The outer layer protects the base particle from exposure to the environment for a predetermined period, then fails catastrophically so that the interior algaecide can be released.