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Official data from INPI

Rebolo retificador periférico semi - permanente.

ConcedidaInvention Patent

Application data

Number

PI8102061

Type

Invention Patent

Filing

04/06/1981

Publication

10/06/1981

Progress at the INPI

  1. Filing04/06/81
  2. Publication10/06/81
  3. Examination08/16/83
  4. Allowance08/21/84
  5. Grant03/26/85
  6. Expired10/01/96

The letters patent expired on 10/01/1996: 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: 03/26/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

De Beers Industrial Diamond Division (Proprietary) Limited

ZA

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Inventors

A. C. (pessoa física)

H. T. (pessoa física)

S. J. (pessoa física)

S. B. (pessoa física)

Technical data

IPC Classification

Priority claims

GB

8010991 · 04/02/1980

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

03/26/1985

RPI 753

Notificação para pagamento de retribuição

#13.1

12/11/1984

RPI 738

Deferimento

#9.1

08/21/1984

RPI 722

Exigência - art. 36 da LPI

#6.1

02/14/1984

RPI 695

Solicitação de exame técnico

#4.1

08/16/1983

RPI 669

Publicação do pedido de patente

#3.1

10/06/1981

RPI 572

Carta-patente expirada

#21.1

10/01/1996

RPI 1348

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