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. 08, 1980
Filed:
Mar. 17, 1978
Applicant:
Inventors:
Assignee:
Mitsui Petrochemical Industries, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E02B / ; F16L / ;
U.S. Cl.
CPC ...
405 43 ; 405 49 ; 138173 ;
Abstract
An underdrainage pipe comprises a liquid-collecting pipe, protrusions on the liquid-collecting pipe, a filter layer around the liquid-collecting pipe and a liquid-conducting way, and the protrusions having at least one recess for each and the bottom portion of the recess not reaching the surface of the liquid-collecting pipe.
Quick Actions:
Hieda, Shozo. (1980). Underdrainage pipe (U.S. Patent No. 4182580). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4182580
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile