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Official data from INPI

PROCESSO PARA A RECARBURAÇÃO REGULÁVEL, OU AQUECIMENTO EM GÁS PROTETOR DE PEÇAS DE AÇO

ConcedidaInvention Patent
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Application data

Number

PI8008362

Type

Invention Patent

Filing

12/19/1980

Publication

-
View on INPI

Progress at the INPI

  1. Filing12/19/80
  2. Publication
  3. Examination10/20/81
  4. Allowance02/14/84
  5. Grant08/28/84
  6. Expired03/19/96

The letters patent expired on 03/19/1996: 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: 08/28/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Maag Gear-Wheel & Machine Company Limited

CH

Inventors

W. U. (pessoa física)

Technical data

IPC Classification

C21D 1/76C23C 8/22

Priority claims

CH

11 303/79 · 12/20/1979

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/28/1984

RPI 723

Notificação para pagamento de retribuição

#13.1

06/05/1984

RPI 711

Deferimento

#9.1

02/14/1984

RPI 695

Republicação - classificação IPC

#15.11

05/24/1983

RPI 657

Exigência - art. 36 da LPI

#6.1

04/05/1983

RPI 650

Solicitação de exame técnico

#4.1

10/20/1981

RPI 574

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. A classificação IPC anterior era C23C 11/12.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

03/19/1996

RPI 1320

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