Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Reexamination Certificate
2006-06-27
2006-06-27
Wu, David W. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Treating polymer containing material or treating a solid...
C528S481000, C528S501000, C264S115000, C264S045500
Reexamination Certificate
active
07067616
ABSTRACT:
One or more PTFE films are heated to greater than 150 degrees centigrade (C) and for a time greater than 20 hours, then the PTFE films are cooled. The PTFE films may be heated to temperatures greater than 200° C. and less than 250° C. and most preferably heated to a temperature of about 228° C. The PTFE films may be kept at a temperature for greater than 50 hours or most preferably kept at a temperature for around 100 hours. The PTFE films may be heat processable PTFE fluoropolymer films and may have a number of heat affected zones. The heat affected zones may be created before or after heat treating. The heat affected zones are generally caused by welding two or more PTFE films together, usually under pressure. An “optimal” temperature and “optimal” time period are determined at which heat processed polytetrafluoroethylene (PTFE) fluoropolymers should be heat treated.
REFERENCES:
patent: 3432511 (1969-03-01), Reiling
patent: 3975481 (1976-08-01), Baumgaertner
patent: 4220511 (1980-09-01), Derbyshire
patent: 5215662 (1993-06-01), Johnson et al.
patent: 5377708 (1995-01-01), Bergman et al.
patent: 5597873 (1997-01-01), Chambers et al.
patent: WO-2005/003189 (2005-01-01), None
Advanced Technology & Materials Inc.
Chappuis Margaret
Gustafson Vincent K.
Hu Henry S.
Hultquist Steven J.
LandOfFree
Polytetrafluoroethylene treatment does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polytetrafluoroethylene treatment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polytetrafluoroethylene treatment will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3668696