Carta-patente expirada
#21.1
07/20/1993
RPI 1181
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Official data from INPI
PROCESSO E APARELHO PARA SEPARAR AREIA DE PARTICULAS VEGETAIS FINAS
Arquivada/ExtintaInvention Patent
Progress at the INPI
- Filing10/20/75
- Publication
- Examination
- Allowance
- Grant
- Expired07/20/93
The letters patent expired on 07/20/1993: 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: 07/20/1993. We update with every new RPI gazette, published weekly.
Applicants and inventors
Applicants
BROWN & WILLIAMSON TOBACCO
Inventors
S. T. (pessoa física)
Technical data
IPC Classification
No IPC classification.
Prosecution history
Publications in the Brazilian Industrial Property Gazette (RPI).
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