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. 14, 2014
Filed:
Aug. 17, 2007
Joseph A. Fernando, Amherst, NY (US);
Kenneth B. Miller, Lockport, NY (US);
Chad E. Garvey, Lewiston, NY (US);
Joseph A. Fernando, Amherst, NY (US);
Kenneth B. Miller, Lockport, NY (US);
Chad E. Garvey, Lewiston, NY (US);
Unifrax I LLC, Tonawanda, NY (US);
Abstract
An insulated double-walled pipe including an inner pipe, an outer pipe surrounding the inner pipe to provide a substantially uniform annular gap between the inner and outer pipes, and optionally an annular flange connected to at least one end of the inner and outer pipe, wherein the annular gap is substantially filled with an insulating paste comprising a fiber component, an inorganic binder component, and optionally a vermiculite component, a filler component, and an organic binder component. A method for preparing the insulated double-walled pipe includes providing a double-walled pipe having an annular space between the walls; introducing an insulating paste material into the annular space; freezing the insulating paste material in the pipe; bending the pipe; and thawing and gelling the paste material.