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Official data from INPI

CASSETE DE FITA MAGNÉTICA.

Em AnáliseInvention Patent

Application data

Number

PI8600019

Type

Invention Patent

Filing

01/06/1986

Publication

09/23/1986

Progress at the INPI

  1. Filing01/06/86
  2. Publication09/23/86
  3. Examination11/01/88
  4. Allowance11/03/92
  5. Grant04/27/93
  6. Expired07/22/08

The letters patent expired on 07/22/2008: 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: 11/01/1988. 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

D. T. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

690.467 · 01/10/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

11/01/1988

RPI 941

Publicação do pedido de patente

#3.1

09/23/1986

RPI 831

Pedido de patente depositado

#2.1

04/08/1986

RPI 807

Carta-patente expirada

#21.1

Patente extinta em 06/01/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

04/27/1993

RPI 1169

Deferimento

#9.1

11/03/1992

RPI 1144

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