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Official data from INPI

PROCESSO E DISPOSITIVO PARA A REMOCAO DE ESCORIA

Concessão AnuladaInvention Patent

Application data

Number

PI7904148

Type

Invention Patent

Filing

06/29/1978

Publication

-

Progress at the INPI

  1. Filing06/29/78
  2. Publication
  3. Examination
  4. Allowance11/01/83
  5. Grant04/24/84
  6. Expired04/04/95

The letters patent expired on 04/04/1995: 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

RUHRKOHLE AG

Inventors

L. J. (pessoa física)

S. J. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

16.3

09/25/1984

RPI 727

Republicação - classificação IPC

#15.11

05/02/1984

RPI 706

Concessão da patente

#16.1

04/24/1984

RPI 705

Notificação para pagamento de retribuição

#13.1

02/14/1984

RPI 695

Republicação - classificação IPC

#15.11

02/07/1984

RPI 694

Deferimento

#9.1

11/01/1983

RPI 680

Exigência - art. 36 da LPI

#6.1

02/01/1983

RPI 641

Carta-patente expirada

#21.1

04/04/1995

RPI 1270

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