Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Reexamination Certificate
2005-11-01
2005-11-01
Bissett, Melanie (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
C521S079000, C428S305500, C428S308400, C428S314200
Reexamination Certificate
active
06960616
ABSTRACT:
Open-celled membranes from thermoplastic polymers are prepared from foamed polymer melts by extrusion through a die and particulary suitable for filtration.
REFERENCES:
patent: 5695996 (1997-12-01), Quinn et al.
patent: 5837365 (1998-11-01), Chung
patent: 5847012 (1998-12-01), Shalaby et al.
Bissett Melanie
Chernoff Vilhauer McClung & Stenzel LLP
Sartorius AG
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