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Official data from INPI

SEM TITULO

ConcedidaInvention Patent

Application data

Number

PI7406751

Type

Invention Patent

Filing

08/15/1974

Publication

-

Progress at the INPI

  1. Filing08/15/74
  2. Publication
  3. Examination
  4. Allowance
  5. Grant10/26/82
  6. Expired11/17/92

The letters patent expired on 11/17/1992: 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: 10/26/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Mitsubishi Rayon Co., Ltd.

JP

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Inventors

E. B. (pessoa física)

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/26/1982

RPI 627

Notificação para pagamento de retribuição

#13.1

05/18/1982

RPI 604

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: C07C 51/00; C07C 57/00; C07C 51/26.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

11/17/1992

RPI 1146

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