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Official data from INPI

PROCESSO PARA OBTENCAO DE UM MATERIAL CURTENTE,E,PROCESSO PARA O POS-CURTIMENTO DE COUROS CURTIDO POR CURTIMENTO MINERAL

ConcedidaInvention Patent

Application data

Number

PI7906356

Type

Invention Patent

Filing

10/04/1978

Publication

-

Progress at the INPI

  1. Filing10/04/78
  2. Publication
  3. Examination11/17/81
  4. Allowance03/27/84
  5. Grant09/25/84
  6. Expired04/25/95

The letters patent expired on 04/25/1995: 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: 09/25/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

BASF AG

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Inventors

L. D. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/25/1984

RPI 727

Notificação para pagamento de retribuição

#13.1

07/17/1984

RPI 717

Deferimento

#9.1

03/27/1984

RPI 701

6.2

02/08/1983

RPI 642

Solicitação de exame técnico

#4.1

11/17/1981

RPI 578

Carta-patente expirada

#21.1

04/25/1995

RPI 1273

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