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Official data from INPI

RESISTOR SUJEITO A TENSÃO NÃO LINEAR, E, PROCESSO DE FABRICAR O MESMO

Em AnáliseInvention Patent

Application data

Number

PI8501937

Type

Invention Patent

Filing

04/24/1985

Publication

12/24/1985

Progress at the INPI

  1. Filing04/24/85
  2. Publication12/24/85
  3. Examination07/22/86
  4. Allowance04/30/91
  5. Grant04/27/93
  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: 07/22/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Hitachi, Ltd.

JP

See this company's full portfolio

Inventors

M. S. (pessoa física)

JP

S. O. (pessoa física)

JP

T. Y. (pessoa física)

JP

Technical data

IPC Classification

Priority claims

JP

81831/84 · 04/25/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

07/22/1986

RPI 822

Publicação do pedido de patente

#3.1

12/24/1985

RPI 792

Pedido de patente depositado

#2.1

07/02/1985

RPI 767

Carta-patente expirada

#21.1

Patente extinta em 24/04/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

04/27/1993

RPI 1169

136

01/12/1993

RPI 1154

13.2

10/29/1991

RPI 1091

15.15

08/20/1991

RPI 1081

Notificação para pagamento de retribuição

#13.1

08/13/1991

RPI 1080

Deferimento

#9.1

04/30/1991

RPI 1065

Exigência - art. 36 da LPI

#6.1

10/09/1990

RPI 1036

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