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:
Jun. 27, 2017
Filed:
Oct. 31, 2012
Iti Scotland Limited, Strathclyde, GB;
Andrew Stevenson, Hertfordshire, GB;
ITI SCOTLAND LIMITED, Strathclyde, GB;
Abstract
The present invention provides a tubular article (), such as may be used as an oil and gas pipeline, having a longitudinal axis X comprising inner and outer separate strips () of spirally wound overlapping material each having a longitudinal axis L and first and second edges ('), in which each strip () comprises two or more longitudinally extending ridges (′), each of which extends along said longitudinally extending axis L in parallel to each other and in which said ridges (′) each comprise asymmetric ridges having a leading edge (′) forming a contact portion (′) and wherein said leading edges (′) are each in contact with each other and further comprising a non-contact trailing edge portion (′) which are spaced from each other by an amount G.