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:
May. 19, 1992
Filed:
Jul. 14, 1988
Peter E Graf, Orinda, CA (US);
Chevron Research and Technology Company, San Francisco, CA (US);
Abstract
A paving composition comprising about 80 to 97% by weight of an open-graded aggregate and about 3 to 20% asphalt, said composition being formed by successively mixing two asphalt-containing emulsions A and B with said aggretate wherein: emulsion A comprises about 40 to 75% by weight of a soft asphalt having a viscosity in the range of 50 to 1000 centistokes at 210.degree. F. and 0.05 to 5% by weight of a emulsifier, and water as a continuous phase of said emulsion to make up 100% by weight; and emulsion B comprises about 40 to 75% by weight of a hard asphalt having a penetration 5 to 25 dmm at 77.degree. F. and 0.05 to 5% by weight of a emulsifier, and water as a continuous phase of said emulsion to make up 100% by weight.