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Official data from INPI

FLUIDO DE TRATAMENTO AQUOSO PROCESSO DE INJECAO DE UMA PASTA DE CIMENTACAO AQUOSA

ConcedidaInvention Patent

Application data

Number

PI8108540

Type

Invention Patent

Filing

12/30/1981

Publication

08/16/1983

Progress at the INPI

  1. Filing12/30/81
  2. Publication08/16/83
  3. Examination08/13/85
  4. Allowance07/19/88
  5. Grant03/28/89
  6. Terminated06/27/95

The patent was granted on 03/28/1989 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 03/28/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DOW CHEMICAL CO [US]

See this company's full portfolio

Inventors

B. E. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

03/28/1989

RPI 962

Notificação para pagamento de retribuição

#13.1

11/16/1988

RPI 943

Deferimento

#9.1

07/19/1988

RPI 926

Exigência - art. 36 da LPI

#6.1

12/08/1987

RPI 894

Solicitação de exame técnico

#4.1

08/13/1985

RPI 773

Publicação do pedido de patente

#3.1

08/16/1983

RPI 669

Pedido de patente depositado

#2.1

02/24/1982

RPI 592

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: C09K 7/00; E21B 33/14; E21B 43/00.

03/27/2018

RPI 2464

Anuidade - prazo legal encerrado

#18.2

06/27/1995

RPI 1282

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