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Official data from INPI

SISTEMA INTERFEROMÉTRICO COM FIBRA ÓTICA DE TIPO SAGNAC

Em AnáliseInvention Patent

Application data

Number

PI8802842

Type

Invention Patent

Filing

06/10/1988

Publication

01/03/1989

Progress at the INPI

  1. Filing06/10/88
  2. Publication01/03/89
  3. Examination05/30/89
  4. Allowance06/08/93
  5. Grant03/01/95
  6. Expired09/02/08

The letters patent expired on 09/02/2008: 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: 05/30/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Alsthom

FR

See this company's full portfolio

Inventors

J. D. (pessoa física)

FR

Technical data

IPC Classification

Priority claims

FR

87 08 135 · 06/11/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

05/30/1989

RPI 971

Publicação do pedido de patente

#3.1

01/03/1989

RPI 950

Pedido de patente depositado

#2.1

11/01/1988

RPI 941

Carta-patente expirada

#21.1

Patente extinta em 10/06/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

03/01/1995

RPI 1265

Deferimento

#9.1

06/08/1993

RPI 1175

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