×

Fibre-reinforced cementitious product

  • US 4,373,957 A
  • Filed: 07/29/1981
  • Issued: 02/15/1983
  • Est. Priority Date: 02/14/1979
  • Status: Expired due to Fees
First Claim
Patent Images

1. A fibre-reinforced cementitious product comprising a matrix of cementitious material and 3 to 13% by weight, based on the total weight of the cementitious product, of a fibrous material comprising a mixture of rock wool fibers and a sufficient amount of hemp fibers to provide a final product having an average minimum bending strength of 176±

  • 17 kg/cm2 at 1.7 g/cm3.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×