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Official data from INPI

PERMUTADOR DE CALOR REGENERATIVO ROTATIVO

Em AnáliseInvention Patent

Application data

Number

PI8303477

Type

Invention Patent

Filing

06/29/1983

Publication

02/12/1985

Progress at the INPI

  1. Filing06/29/83
  2. Publication02/12/85
  3. Examination07/02/85
  4. Allowance04/22/86
  5. Grant11/25/86
  6. Terminated10/10/89

The patent was granted on 11/25/1986 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 10/10/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

BABCOCK & WILCOX CO [US]

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Inventors

C. C. (pessoa física)

L. S. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Anuidade - prazo legal encerrado

#18.2

10/10/1989

RPI 990

Concessão da patente

#16.1

11/25/1986

RPI 840

Notificação para pagamento de retribuição

#13.1

08/26/1986

RPI 827

Deferimento

#9.1

04/22/1986

RPI 809

Solicitação de exame técnico

#4.1

07/02/1985

RPI 767

Publicação do pedido de patente

#3.1

02/12/1985

RPI 747

Pedido de patente depositado

#2.1

08/09/1983

RPI 668

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