20.4
07/12/1988
RPI 925
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Official data from INPI
PROCESSO APERFEIÇOADO PARA DESIDRATAÇÃO DO ETANOL HIDRATADO EM ETENO
Em AnáliseInvention Patent
Application data
Number
PI8100507Type
Invention Patent
Filing
01/29/1981
Publication
09/28/1982
Progress at the INPI
- Filing01/29/81
- Publication09/28/82
- Examination01/18/83
- Allowance01/06/87
- Grant03/29/88
- Expired03/19/96
The letters patent expired on 03/19/1996: 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: 07/12/1988. We update with every new RPI gazette, published weekly.
Applicants and inventors
Applicants
Union Carbide do Brasil Ltda.
SP, BR
Union Carbide do Brasil S/A
SP, BR
Inventors
F. F. (pessoa física)
N. D. (pessoa física)
P. T. (pessoa física)
S. T. (pessoa física)
Technical data
IPC Classification
Prosecution history
Publications in the Brazilian Industrial Property Gazette (RPI).
Concessão da patente
#16.1
03/29/1988
RPI 910
110
11/03/1987
RPI 889
Recurso
#12.1
04/14/1987
RPI 860
Deferimento
#9.1
01/06/1987
RPI 846
Exigência - art. 36 da LPI
#6.1
06/03/1986
RPI 815
Pedido de certificado de adição de invenção
#5.1
06/28/1983
RPI 662
Solicitação de exame técnico
#4.1
01/18/1983
RPI 639
Publicação do pedido de patente
#3.1
09/28/1982
RPI 623
Carta-patente expirada
#21.1
03/19/1996
RPI 1320
20.4
09/05/1995
RPI 1292
20.4
03/13/1990
RPI 1009
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