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Official data from INPI

TUBO HELICOIDAL CORRUGADO RESISTENTE À PRESSÃO

Arquivada/ExtintaInvention Patent

Application data

Number

PI8906800

Type

Invention Patent

Filing

12/22/1989

Publication

05/15/1990

Progress at the INPI

  1. Filing12/22/89
  2. Publication05/15/90
  3. Examination09/18/90
  4. Allowance04/27/93
  5. Grant09/28/93
  6. Expired12/29/09

The letters patent expired on 12/29/2009: 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: 12/29/2009. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

S. K. (pessoa física)

JP

See this company's full portfolio

Inventors

S. K. (pessoa física)

JP

Technical data

IPC Classification

Priority claims

JP

333133 · 12/27/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 22/12/2004

12/29/2009

RPI 2034

Concessão da patente

#16.1

09/28/1993

RPI 1191

Deferimento

#9.1

04/27/1993

RPI 1169

Exigência - art. 36 da LPI

#6.1

06/23/1992

RPI 1125

Solicitação de exame técnico

#4.1

09/18/1990

RPI 1033

Publicação antecipada

#3.2

05/15/1990

RPI 1018

Pedido de patente depositado

#2.1

04/17/1990

RPI 1014

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