Concessão da patente
#16.1
07/26/1983
RPI 666
The letters patent expired on 11/07/1995: 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: 07/26/1983. We update with every new RPI gazette, published weekly.
Applicants
E.I. Du Pont de Nemours and Company
US
Inventors
M. B. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#16.1
07/26/1983
RPI 666
#13.1
05/24/1983
RPI 657
#9.1
12/21/1982
RPI 635
#15.11
Procedimento automático de reclassificação. A classificação IPC anterior era G02B 5/16.
03/27/2018
RPI 2464
#21.1
11/07/1995
RPI 1301
From the same holder
Same category
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