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Official data from INPI

COMPOSICAO DE MATERIA,COMPOSICOES INIBIDORAS DE CORROSAO,PROCESSO PARA ESTABILIZACAO DE SILICATOS SOLUVEIS,E PROCESSO PARA INIBICAO DE CORROSAO DE METAL EM UM MEIO AQUOSO

ConcedidaInvention Patent
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Application data

Number

PI7901923

Type

Invention Patent

Filing

03/30/1978

Publication

-
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Progress at the INPI

  1. Filing03/30/78
  2. Publication
  3. Examination12/08/81
  4. Allowance11/08/88
  5. Grant07/25/89
  6. Expired06/21/94

The letters patent expired on 06/21/1994: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 07/25/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

D. C. (pessoa física)

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Inventors

P. E. (pessoa física)

Technical data

IPC Classification

C07F 9/38C07F 9/40C23F 11/08C23F 11/10C23F 11/16C23F 11/18

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

02/28/1989

RPI 958

Deferimento

#9.1

11/08/1988

RPI 942

Exigência - art. 36 da LPI

#6.1

04/19/1988

RPI 913

Exigência - art. 36 da LPI

#6.1

02/12/1985

RPI 747

Conhecimento de parecer técnico

#7.1

03/20/1984

RPI 700

Republicação - classificação IPC

#15.11

03/13/1984

RPI 699

Solicitação de exame técnico

#4.1

12/08/1981

RPI 581

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

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