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Official data from INPI

PROCESSO DE MANUFATURA DE UMA COMPOSICAO DE CATALISADOR

ConcedidaInvention Patent

Application data

Number

PI7802705

Type

Invention Patent

Filing

04/29/1977

Publication

-

Progress at the INPI

  1. Filing04/29/77
  2. Publication
  3. Examination
  4. Allowance03/01/83
  5. Grant09/27/83
  6. Expired09/21/93

The letters patent expired on 09/21/1993: 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: 09/27/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ENGELHARD MIN & CHEM

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Inventors

D. J. (pessoa física)

H. S. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/27/1983

RPI 675

Notificação para pagamento de retribuição

#13.1

06/21/1983

RPI 661

Deferimento

#9.1

03/01/1983

RPI 645

14.1

08/10/1982

RPI 616

Carta-patente expirada

#21.1

09/21/1993

RPI 1190

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