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Official data from INPI

dispositivo de controle de escapamento entre flanges de ligação de virolas de uma instalação elétrica sob envoltório metálico cheio de gás comprimido.

Em AnáliseInvention Patent
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Application data

Number

PI8102279

Type

Invention Patent

Filing

04/14/1981

Publication

12/01/1981
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Progress at the INPI

  1. Filing04/14/81
  2. Publication12/01/81
  3. Examination10/18/83
  4. Allowance06/26/84
  5. Grant12/26/84
  6. Expired10/01/96

The letters patent expired on 10/01/1996: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 11/10/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Alsthom.

FR

Alsthom-Atlantique

FR

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Inventors

O. H. (pessoa física)

Technical data

IPC Classification

H02G 15/24

Priority claims

FR

80 08 591 · 04/17/1980

FR

80 19 904 · 09/16/1980

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.4

11/10/1987

RPI 890

Republicação - classificação IPC

#15.11

01/08/1985

RPI 742

Concessão da patente

#16.1

12/26/1984

RPI 740

Notificação para pagamento de retribuição

#13.1

10/23/1984

RPI 731

Deferimento

#9.1

06/26/1984

RPI 714

Solicitação de exame técnico

#4.1

10/18/1983

RPI 678

Publicação do pedido de patente

#3.1

12/01/1981

RPI 580

Carta-patente expirada

#21.1

10/01/1996

RPI 1348

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