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Official data from INPI

APARELHO DE PURIFICAR GASES POR MEIO DE LAVAGEM

ConcedidaInvention Patent
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Application data

Number

PI8207549

Type

Invention Patent

Filing

12/28/1982

Publication

04/17/1984
View on INPI

Progress at the INPI

  1. Filing12/28/82
  2. Publication04/17/84
  3. Examination05/27/86
  4. Allowance01/10/89
  5. Grant08/29/89
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 08/29/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Theisen GmbH

DE

Inventors

W. G. (pessoa física)

DE

Technical data

IPC Classification

B01D 47/06B01D 53/14F27D 17/00

Priority claims

DE

P 32 20 328.4 · 05/28/1982

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/29/1989

RPI 984

Notificação para pagamento de retribuição

#13.1

05/30/1989

RPI 971

Deferimento

#9.1

01/10/1989

RPI 951

Exigência - art. 36 da LPI

#6.1

08/02/1988

RPI 928

6.2

11/25/1986

RPI 840

Solicitação de exame técnico

#4.1

05/27/1986

RPI 814

Publicação do pedido de patente

#3.1

04/17/1984

RPI 704

Pedido de patente depositado

#2.1

02/16/1983

RPI 643

Carta-patente expirada

#21.1

Patente extinta em 28/12/97

07/01/2008

RPI 1956

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