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Official data from INPI

AGENTES DE PROTECAO CONTRA A CORROSAO E PROCESSO PARA EVITAR A CORROSAO DE METAIS FERROSOS EM CONTATO COM AGUA OU COM LIQUIDOS AQUOSOS

ConcedidaInvention Patent

Application data

Number

PI7806084

Type

Invention Patent

Filing

09/19/1977

Publication

-

Progress at the INPI

  1. Filing09/19/77
  2. Publication
  3. Examination
  4. Allowance06/21/88
  5. Grant02/28/89
  6. Expired05/03/94

The letters patent expired on 05/03/1994: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

Talk to a specialist

Latest action published by the INPI: 02/28/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

HOECHST AG

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Inventors

D. H. (pessoa física)

F. H. (pessoa física)

H. R. (pessoa física)

L. H. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

02/28/1989

RPI 958

Notificação para pagamento de retribuição

#13.1

08/30/1988

RPI 932

100

06/21/1988

RPI 922

120

11/03/1987

RPI 889

Petição de recurso

#12.2

05/15/1984

RPI 708

Indeferimento

#9.2

01/31/1984

RPI 693

Conhecimento de parecer técnico

#7.1

11/30/1982

RPI 632

6.2

01/26/1982

RPI 588

Carta-patente expirada

#21.1

05/03/1994

RPI 1222

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