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Official data from INPI

UNIDADE DE ENCHIMENTO CORRUGADA COM RANHURAS ANGULARES PARA TORRE DE RESFRIAMENTO DE ÁGUA E FOLHA DE ENCHIMENTO FEITO DE MATERIAL CONFORMÁVEL.

ConcedidaInvention Patent

Application data

Number

PI8101936

Type

Invention Patent

Filing

03/31/1981

Publication

11/03/1982

Progress at the INPI

  1. Filing03/31/81
  2. Publication11/03/82
  3. Examination03/01/83
  4. Allowance02/14/84
  5. Grant09/25/84
  6. Expired09/24/96

The letters patent expired on 09/24/1996: 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: 09/25/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Baltimore Aircoil Company Inc

US

Baltimore Aircoil Company, Inc

US

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Inventors

C. P. (pessoa física)

C. E. (pessoa física)

H. H. (pessoa física)

S. N. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/25/1984

RPI 727

Notificação para pagamento de retribuição

#13.1

06/05/1984

RPI 711

Deferimento

#9.1

02/14/1984

RPI 695

Solicitação de exame técnico

#4.1

03/01/1983

RPI 645

Publicação do pedido de patente

#3.1

11/03/1982

RPI 628

Carta-patente expirada

#21.1

09/24/1996

RPI 1347

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