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Official data from INPI

MEIO DE GRAVAÇÃO MAGNÉTICA COM UM REVESTIMENTO MAGNETIZÁVEL E PROCESSO DE SUA FABRICAÇÃO

ConcedidaInvention Patent

Application data

Number

PI8303540

Type

Invention Patent

Filing

07/01/1983

Publication

02/14/1984

Progress at the INPI

  1. Filing07/01/83
  2. Publication02/14/84
  3. Examination06/10/86
  4. Allowance01/10/89
  5. Grant08/29/89
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 08/29/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Minnesota Mining and Manufacturing Company

US

See this company's full portfolio

Inventors

G. F. (pessoa física)

US

M. D. (pessoa física)

US

Technical data

Priority claims

US

394,531 · 07/02/1982

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/29/1989

RPI 984

Notificação para pagamento de retribuição

#13.1

05/30/1989

RPI 971

Deferimento

#9.1

01/10/1989

RPI 951

Exigência - art. 36 da LPI

#6.1

05/10/1988

RPI 916

6.2

09/15/1987

RPI 882

Solicitação de exame técnico

#4.1

06/10/1986

RPI 816

Publicação do pedido de patente

#3.1

02/14/1984

RPI 695

Pedido de patente depositado

#2.1

08/16/1983

RPI 669

Carta-patente expirada

#21.1

Patente extinta em 01/07/98

07/01/2008

RPI 1956

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