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Official data from INPI

TORRE DE RESFRIAMENTO; E COLUNA ESTRUTURAL

Arquivada/ExtintaInvention Patent

Application data

Number

PI9001673

Type

Invention Patent

Filing

04/09/1990

Publication

05/14/1991

Progress at the INPI

  1. Filing04/09/90
  2. Publication05/14/91
  3. Examination11/05/91
  4. Allowance04/12/94
  5. Grant12/27/94
  6. Expired05/18/10

The letters patent expired on 05/18/2010: 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: 05/18/2010. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Bac-Pritchard, Inc

US

Baltimore Aircoil Company, Inc

US

Inventors

C. B. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

392.448 · 08/14/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 09/04/2005

05/18/2010

RPI 2054

Concessão da patente

#16.1

12/27/1994

RPI 1256

14.1

08/02/1994

RPI 1235

Deferimento

#9.1

04/12/1994

RPI 1219

Retificação

#15.6

11/03/1993

RPI 1196

Retificação

#15.3

08/03/1993

RPI 1183

14.1

04/13/1993

RPI 1167

Solicitação de exame técnico

#4.1

11/05/1991

RPI 1092

Publicação do pedido de patente

#3.1

05/14/1991

RPI 1067

Pedido de patente depositado

#2.1

08/14/1990

RPI 1028

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