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Official data from INPI

COMPOSICAO POLIMERA UTIL PARA ESPESSAMENTO DE SALMOURAS AQUOSAS, FLUIDO PARA OPERACAO DE UM POCO, E PROCESSO PARA PREPARACAO DE TAL FLUIDO

ConcedidaInvention Patent

Application data

Number

PI8102719

Type

Invention Patent

Filing

05/05/1980

Publication

01/26/1982

Progress at the INPI

  1. Filing05/05/80
  2. Publication01/26/82
  3. Examination03/13/84
  4. Allowance11/01/88
  5. Grant07/25/89
  6. Terminated02/04/92

The patent was granted on 07/25/1989 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: 07/25/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

NL INDUSTRIES INC

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Inventors

H. L. (pessoa física)

H. R. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/25/1989

RPI 979

Notificação para pagamento de retribuição

#13.1

02/21/1989

RPI 957

Deferimento

#9.1

11/01/1988

RPI 941

Exigência - art. 36 da LPI

#6.1

03/29/1988

RPI 910

Conhecimento de parecer técnico

#7.1

04/09/1985

RPI 755

Pedido de certificado de adição de invenção

#5.1

08/07/1984

RPI 720

Solicitação de exame técnico

#4.1

03/13/1984

RPI 699

Publicação do pedido de patente

#3.1

01/26/1982

RPI 588

Anuidade - prazo legal encerrado

#18.2

02/04/1992

RPI 1105

14.11

05/22/1990

RPI 1019

14.1

03/20/1990

RPI 1010

14.3

03/13/1990

RPI 1009

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