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:
Jan. 18, 2005
Filed:
Mar. 18, 2003
John M. Forgac, Elmhurst, IL (US);
Ashok S. Muzumdar, Naperville, IL (US);
Arun K. Singhania, Houston, TX (US);
April J. Swanson, Anderson, SC (US);
John M. Forgac, Elmhurst, IL (US);
Ashok S. Muzumdar, Naperville, IL (US);
Arun K. Singhania, Houston, TX (US);
April J. Swanson, Anderson, SC (US);
BP Corporation North America Inc., Warrenville, IL (US);
Abstract
The present invention provides an improved polymer additive which may be used to increase the high temperature viscosity of an asphalt, without deleteriously affecting the low-temperature viscosity of the asphalt. The polymer additive may also be used to improve the stiffness of certain asphalts. The polymer additive is produced from readily available polymer blends by a thermal process. The invention additionally provides an improved polymer modified asphalt. In its preferred embodiments, the invention also provides an environmentally acceptable method for recycle of post consumer carpet and bottles.