Concessão da patente
#16.1
11/29/1983
RPI 684
The letters patent expired on 07/27/1993: 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: 11/29/1983. We update with every new RPI gazette, published weekly.
Applicants
U. C. (pessoa física)
US
Inventors
E. B. (pessoa física)
GB
R. P. (pessoa física)
US
IPC Classification
Priority claims
US
674.823 · 04/08/1976
US
776.934 · 03/11/1977
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Procedimento automático de reclassificação. A classificação IPC anterior era C07C 45/04.
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