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Official data from INPI

CALDEIRA COM TUBO INCINERADOR HORIZONTAL REFRIGERADO A ÁGUA

Em AnáliseInvention Patent

Application data

Number

PI8603452

Type

Invention Patent

Filing

07/22/1986

Publication

03/04/1987

Progress at the INPI

  1. Filing07/22/86
  2. Publication03/04/87
  3. Examination05/16/89
  4. Allowance03/12/91
  5. Grant10/29/91
  6. Expired07/22/08

The letters patent expired on 07/22/2008: 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: 05/16/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

The Dow Chemical Company

US

See this company's full portfolio

Inventors

J. B. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

757.224 · 07/22/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

05/16/1989

RPI 969

Publicação do pedido de patente

#3.1

03/04/1987

RPI 854

Pedido de patente depositado

#2.1

01/13/1987

RPI 847

Carta-patente expirada

#21.1

Patente extinta em 22/07/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

10/29/1991

RPI 1091

Notificação para pagamento de retribuição

#13.1

06/25/1991

RPI 1073

Deferimento

#9.1

03/12/1991

RPI 1058

Exigência - art. 36 da LPI

#6.1

02/01/1990

RPI 1004

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