Solicitação de exame técnico
#4.1
10/14/1986
RPI 834
Application data
Number
PI8503821Type
Filing
Publication
The letters patent expired on 07/15/2008: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.
Talk to a specialistLatest action published by the INPI: 10/14/1986. We update with every new RPI gazette, published weekly.
Applicants
PPG Industries Inc
US
Inventors
J. E. (pessoa física)
US
R. C. (pessoa física)
US
R. D. (pessoa física)
US
W. S. (pessoa física)
US
IPC Classification
Priority claims
US
639.874 · 08/13/1984
Publications in the Brazilian Industrial Property Gazette (RPI).
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