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Official data from INPI

APERFEIÇOAMENTO EM CILINDRO DE NITROGENIO

ConcedidaInvention Patent

Application data

Number

PI8506149

Type

Invention Patent

Filing

12/09/1985

Publication

05/20/1986

Progress at the INPI

  1. Filing12/09/85
  2. Publication05/20/86
  3. Examination08/19/86
  4. Allowance02/28/89
  5. Grant09/26/89
  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.

Talk to a specialist

Latest action published by the INPI: 09/26/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Prodty Engenharia e Comércio Ltda.

SP, BR

Inventors

L. M. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/26/1989

RPI 988

Notificação para pagamento de retribuição

#13.1

07/11/1989

RPI 977

Deferimento

#9.1

02/28/1989

RPI 958

Solicitação de exame técnico

#4.1

08/19/1986

RPI 826

Publicação antecipada

#3.2

05/20/1986

RPI 813

Pedido de patente depositado

#2.1

02/25/1986

RPI 801

Carta-patente expirada

#21.1

Patente extinta em 09/12/2000

07/15/2008

RPI 1958

20.4

11/17/1992

RPI 1146

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