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Official data from INPI

METODO PARA OPERACAO DE UM DISPOSITIVO DE EXIBICAO ELETROCROMICO

ConcedidaInvention Patent

Application data

Number

PI7608848

Type

Invention Patent

Filing

12/30/1975

Publication

-

Progress at the INPI

  1. Filing12/30/75
  2. Publication
  3. Examination
  4. Allowance01/11/83
  5. Grant06/28/83
  6. Expired07/27/93

The letters patent expired on 07/27/1993: 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: 06/28/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

IBM

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Inventors

B. D. (pessoa física)

H. M. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/28/1983

RPI 662

Deferimento

#9.1

01/11/1983

RPI 638

Exigência - art. 36 da LPI

#6.1

08/10/1982

RPI 616

102

05/04/1982

RPI 602

Pedido de recurso

#12.3

01/26/1982

RPI 588

Carta-patente expirada

#21.1

07/27/1993

RPI 1182

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