Patent · US Active

PTFE membrane

US7922946B2 · kind B2 · utility

2Cited by

16References

15Claims

0Family size

Assignee

Donaldson Company, Inc. · US

Inventors

Richard Brandimarte · Bensalem, US
Kirit Patel · Bound Brook, US

Key dates

Filing date	Nov 23, 2005
Grant date	Apr 12, 2011
Priority date	—
Expiry date	Mar 25, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2327/18
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method for improving the dimensional stability of PTFE membranes by the application of elevated temperature and elevated pressure to a PTFE membrane. The process reduces and/or eliminates the relaxation stress normally associated with PTFE membranes made using previously existing methods.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.