Patent · US Expired

Process for removing chemical preservatives from wood using supercritical fluid extraction

US5364475A · kind A · utility

10Cited by

9References

15Claims

0Family size

Assignee

State of Oregon acting by and through the State Board of Higher Ed. on Behalf of Oregon State Univ. · US

Inventors

Keith L. Levien · Corvallis, US
Jeffrey J. Morrell · Corvallis, US
Satish Kumar · Hyderabad, IN
Endalkachew Sahle-Demessie · Corvallis, US

Key dates

Filing date	Jul 30, 1993
Grant date	Nov 15, 1994
Priority date	—
Expiry date	Jul 30, 2013

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D11/0203
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The process of the present invention is directed to the remediation of wood that has been treated with a preservative, such as pentachlorophenol or other non-ionic organic biocides, using supercritical fluids, with or without the addition of modifiers.

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