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Official data from INPI

AGENTE QUÍMICO PARA CALDEIRA E PROCESSO PARA PREVENÇÃO DE CORROSÃO DE CALDEIRAS

Arquivada/ExtintaInvention Patent

Application data

Number

PI8904733

Type

Invention Patent

Filing

09/20/1989

Publication

05/01/1990

Progress at the INPI

  1. Filing09/20/89
  2. Publication05/01/90
  3. Examination04/07/92
  4. Allowance10/05/99
  5. Grant04/18/00
  6. Expired12/26/12

The letters patent expired on 12/26/2012: 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: 12/26/2012. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Kurita Water Industries Ltd

JP

See this company's full portfolio

Inventors

S. T. (pessoa física)

JP

Technical data

Priority claims

JP

63-237373 · 09/21/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 18/04/2010

12/26/2012

RPI 2190

Concessão da patente

#16.1

04/18/2000

RPI 1528

Deferimento

#9.1

10/05/1999

RPI 1500

Exigência - art. 36 da LPI

#6.1

05/18/1999

RPI 1480

Exigência - art. 36 da LPI

#6.1

07/28/1998

RPI 1440

Exigência - art. 36 da LPI

#6.1

07/02/1996

RPI 1335

Solicitação de exame técnico

#4.1

04/07/1992

RPI 1114

Publicação do pedido de patente

#3.1

05/01/1990

RPI 1016

Pedido de patente depositado

#2.1

01/02/1990

RPI 1000

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