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Official data from INPI

SEM TITULO

ConcedidaInvention Patent
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Application data

Number

PI8105353

Type

Invention Patent

Filing

08/21/1981

Publication

05/11/1982
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Progress at the INPI

  1. Filing08/21/81
  2. Publication05/11/82
  3. Examination08/10/82
  4. Allowance09/18/84
  5. Grant04/30/85
  6. Expired08/19/08

The letters patent expired on 08/19/2008: 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: 04/30/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

T. W. (pessoa física)

Inventors

H. K. (pessoa física)

J. H. (pessoa física)

Technical data

IPC Classification

F04B 27/10F04B 49/06

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

04/30/1985

RPI 758

Deferimento

#9.1

09/18/1984

RPI 726

Solicitação de exame técnico

#4.1

08/10/1982

RPI 616

Publicação do pedido de patente

#3.1

05/11/1982

RPI 603

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: G01P 3/488; B60H 3/04.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

Patente extinta em 21/08/96

08/19/2008

RPI 1963

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