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Official data from INPI

TORRE DE RESFRIAMENTO EM CONTRACORRENTE APERFEIÇOADA, PROCESSO APERFEIÇOADO PARA CONDUZIR AR ATRAVÉS DA MESMA E FOLHA DE ENCHIMENTO APERFEIÇOADA PARA UMA TORRE DE RESFRIAMENTO

PublicadaInvention Patent

Application data

Number

PI8900765

Type

Invention Patent

Filing

02/21/1989

Publication

10/17/1989

Progress at the INPI

  1. Filing02/21/89
  2. Publication10/17/89
  3. Examination07/31/90
  4. Allowance03/24/92
  5. Grant02/24/93
  6. Expired12/15/09

The letters patent expired on 12/15/2009: 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: 10/17/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Baltimore Aircoil Company, Inc

US

See this company's full portfolio

Inventors

B. G. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

158,603 · 02/22/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

10/17/1989

RPI 991

Pedido de patente depositado

#2.1

04/11/1989

RPI 964

Carta-patente expirada

#21.1

Patente extinta em 21/02/2004

12/15/2009

RPI 2032

Concessão da patente

#16.1

02/24/1993

RPI 1160

Notificação para pagamento de retribuição

#13.1

09/01/1992

RPI 1135

Deferimento

#9.1

03/24/1992

RPI 1112

Pedido de certificado de adição de invenção

#5.1

10/09/1990

RPI 1036

Solicitação de exame técnico

#4.1

07/31/1990

RPI 1026

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