Phillips Petroleum Company

Robert L Brost

Floyd H Holland

Homer L Draper

Duane W Gagle

An improved asphalt containing composition having desirable softening point and low temperature properties are prepared by incorporating into the asphalt a hydrogenated rubber, e.g., a hydrogenated styrene vinyl aromatic copolymer, a petroleum solvent, and an essentially amorphous silica.

Asphalt compositions

Improved method and means for laying a strip of film beneath the surface of the soil can include any one or more of the following: (1) method and means for starting the film; (2) method and means for centering the film in a film inlet of a plow; (4) method and means for guiding the film in a feed housing of a plow; (5) method and means for centering the film in a film distribution housing of a plow; and/or (6) method and means for supporting the film while earth is being laid down thereon.

Growing community of inventors

Independence, KS, United States of America

Robert L Brost