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Official data from INPI

PROCESSO PARA REDUZIR A PERDA DE LÍTIO POR OXIDAÇÃO NO TRATAMENTO TÉRMICO DE LIGAS DE A1

DeferidaInvention Patent

Application data

Number

PI8401592

Type

Invention Patent

Filing

04/05/1984

Publication

11/13/1984

Progress at the INPI

  1. Filing04/05/84
  2. Publication11/13/84
  3. Examination07/29/86
  4. Allowance10/24/89
  5. Grant05/29/90
  6. Terminated06/06/95

The patent was granted on 05/29/1990 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 10/24/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Alcan International Limited

CA

See this company's full portfolio

Inventors

D. F. (pessoa física)

GB

E. B. (pessoa física)

GB

K. B. (pessoa física)

GB

Technical data

IPC Classification

Priority claims

GB

8309349 · 04/06/1983

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Deferimento

#9.1

10/24/1989

RPI 992

6.2

06/28/1988

RPI 923

Solicitação de exame técnico

#4.1

07/29/1986

RPI 823

Publicação do pedido de patente

#3.1

11/13/1984

RPI 734

Pedido de patente depositado

#2.1

06/19/1984

RPI 713

Anuidade - prazo legal encerrado

#18.2

06/06/1995

RPI 1279

Republicação - classificação IPC

#15.11

12/08/1992

RPI 1149

Republicação - classificação IPC

#15.11

08/06/1991

RPI 1079

Concessão da patente

#16.1

05/29/1990

RPI 1020

Notificação para pagamento de retribuição

#13.1

03/01/1990

RPI 1007

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