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:
Jul. 24, 2007
Filed:
Jun. 04, 2004
Thomas A. Gates, Parma, MI (US);
James N. Valentine, Rives Junction, MI (US);
David H. Steele, Jackson, MI (US);
Steven H. Bowens, West Chester, PA (US);
Donn L. Briskie, Jackson, MI (US);
Thomas A. Gates, Parma, MI (US);
James N. Valentine, Rives Junction, MI (US);
David H. Steele, Jackson, MI (US);
Steven H. Bowens, West Chester, PA (US);
Donn L. Briskie, Jackson, MI (US);
Certainteed Corp., Valley Forge, PA (US);
Abstract
The present invention includes a screw tip for an extruder screw for effecting mixing in an extruder. The screw tip has a shaft portion and at least one mixing element ring connected to the shaft portion, or a mixing element having an aperture therethrough, or both. The mixing element may have two legs connected by a top portion with the aperture between the two legs to allow flow of extrudate therethrough.