Patents Examined by D. O'Connor
  • Solar collector
    Patent number: 4213929
    Abstract: A solar collector panel is made from glass fiber reinforced concrete using a dissolvable core of polymer foam to form the internal passageways. The core is dissolved in a solution of solvent and polymer which impregnates and coats the concrete surfaces of the passageways to seal the passageways and to isolate the concrete from the heat transfer fluid.
    Type: Grant
    Filed: September 22, 1978
    Date of Patent: July 22, 1980
    Inventor: Michael J. Dobson