Concessão da patente
#16.1
09/29/1987
RPI 884
Progress at the INPI
- Filing06/03/77
- Publication
- Examination
- Allowance02/08/83
- Grant09/29/87
- Expired09/21/93
The letters patent expired on 09/21/1993: 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: 09/29/1987. We update with every new RPI gazette, published weekly.
Applicants and inventors
Applicants
COMGAS CO GAS DE SAO PAULO
Inventors
R. L. (pessoa física)
Technical data
IPC Classification
No IPC classification.
Prosecution history
Publications in the Brazilian Industrial Property Gazette (RPI).
Notificação para pagamento de retribuição
#13.1
05/12/1987
RPI 864
110
12/23/1986
RPI 844
120
01/31/1984
RPI 693
Recurso
#12.1
05/17/1983
RPI 656
Deferimento
#9.1
02/08/1983
RPI 642
Exigência - art. 36 da LPI
#6.1
05/04/1982
RPI 602
Carta-patente expirada
#21.1
09/21/1993
RPI 1190
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