US 12,071,765 B2
Non-white roofing granules and methods of making same
Taisiya Skorina, Woodbury, MN (US); Kristin M. Amsden, St. Paul, MN (US); Kenton D. Budd, Woodbury, MN (US); Rebecca L. A. Everman, Falcon Heights, MN (US); and Jean A. Tangeman, Minneapolis, MN (US)
Assigned to 3M Innovative Properties Company, St. Paul, MN (US)
Appl. No. 18/028,745
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Sep. 7, 2021, PCT No. PCT/IB2021/058134
§ 371(c)(1), (2) Date Mar. 27, 2023,
PCT Pub. No. WO2022/074482, PCT Pub. Date Apr. 14, 2022.
Claims priority of provisional application 63/088,050, filed on Oct. 6, 2020.
Prior Publication US 2023/0332409 A1, Oct. 19, 2023
Int. Cl. E04D 7/00 (2006.01)
CPC E04D 7/005 (2013.01) 17 Claims
OG exemplary drawing
 
1. A plurality of non-white roofing granules comprising:
a) a plurality of particles comprising mineral fines and a calcia-based cement binder, wherein the mineral fines comprise igneous or metamorphic rock, wherein the calcia-based cement binder comprises Portland cement; and
b) a non-white pigment-containing coating disposed on at least a portion of exterior surfaces of the plurality of particles.