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Official data from INPI

PROCESSOS PARA PRODUZIR UMA MEMBRANA COMPÓSITA E PARA SEPARAR HIDROCARBONETOS AROMÁTICOS

PublicadaInvention Patent

Application data

Number

PI8805319

Type

Invention Patent

Filing

10/14/1988

Publication

05/30/1989

Progress at the INPI

Awaiting grant fee payment
  1. Filing10/14/88
  2. Publication05/30/89
  3. Examination07/02/91
  4. Allowance03/14/95
  5. Grant
  6. In force

The application was allowed by the INPI on 03/14/1995. The grant of the letters patent is being processed.

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Latest action published by the INPI: 05/30/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Exxon Research And Engineering Company

US

See this company's full portfolio

Inventors

R. S. (pessoa física)

Technical data

Priority claims

US

108,820 · 10/14/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

05/30/1989

RPI 971

Pedido de patente depositado

#2.1

02/28/1989

RPI 958

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: B01D 13/04; B01D 13/00.

03/27/2018

RPI 2464

Republicação - classificação IPC

#15.11

02/12/1997

RPI 1367

Retificação

#15.3

09/05/1995

RPI 1292

Deferimento

#9.1

03/14/1995

RPI 1267

Solicitação de exame técnico

#4.1

07/02/1991

RPI 1074

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