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. 21, 1992
Filed:
Jul. 23, 1990
Applicant:
Inventors:
Mark L Kasakevich, Missouri City, TX (US);
Donald H Krasner, Houston, TX (US);
Jerry W Secrist, Katy, TX (US);
Roland O Meuhlner, Houston, TX (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
2641 / ; 2642094 ; 264237 ; 425 71 ;
Abstract
A process is disclosed for the formation of polybutylene pipes having improved mechanical properties, by reduction in the rate of cooling of the extrudate used to form the pipe sections. Preferably, the ratio of the cooling bath residence time in minutes divided by the cooling water temperature in degrees Fahrenheit is selected to be in the range of from about 0.004 to about 0.010.