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Official data from INPI

APERFEIÇOAMENTOS EM REGISTRO DE GÁS.

Em AnáliseInvention Patent

Application data

Number

PI8505192

Type

Invention Patent

Filing

10/08/1985

Publication

05/12/1987

Progress at the INPI

  1. Filing10/08/85
  2. Publication05/12/87
  3. Examination10/10/89
  4. Allowance06/12/90
  5. Grant02/13/91
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 10/10/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Delta Metal Ltda

SP, BR

See this company's full portfolio

Inventors

M. P. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

10/10/1989

RPI 990

Publicação do pedido de patente

#3.1

05/12/1987

RPI 864

Pedido de patente depositado

#2.1

01/07/1986

RPI 794

Carta-patente expirada

#21.1

Patente extinta em 08/10/2000

07/15/2008

RPI 1958

20.4

11/17/1992

RPI 1146

Concessão da patente

#16.1

02/13/1991

RPI 1054

Notificação para pagamento de retribuição

#13.1

09/25/1990

RPI 1034

Deferimento

#9.1

06/12/1990

RPI 1022

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