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Official data from INPI

DISQUETE INCLUINDO UM DISCO DE GRAVAÇÃO MAGNÉTICA

Em ExigênciaInvention Patent

Application data

Number

PI8504672

Type

Invention Patent

Filing

09/24/1985

Publication

07/15/1986

Progress at the INPI

  1. Filing09/24/85
  2. Publication07/15/86
  3. Examination08/16/88
  4. Allowance10/02/90
  5. Grant04/30/91
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 06/20/1989. 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

C. F. (pessoa física)

US

M. K. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

654.378 · 09/26/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Exigência - art. 36 da LPI

#6.1

06/20/1989

RPI 974

Solicitação de exame técnico

#4.1

08/16/1988

RPI 930

Publicação do pedido de patente

#3.1

07/15/1986

RPI 821

Pedido de patente depositado

#2.1

12/03/1985

RPI 789

Carta-patente expirada

#21.1

Patente extinta em 24/09/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

04/30/1991

RPI 1065

Notificação para pagamento de retribuição

#13.1

01/15/1991

RPI 1050

Deferimento

#9.1

10/02/1990

RPI 1035

Exigência - art. 36 da LPI

#6.1

03/06/1990

RPI 1008

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