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Official data from INPI

PROCESSO PARA DECOQUIFICAÇÃO DE TUBOS DE AQUECEDOR A CHAMA

Em AnáliseInvention Patent

Application data

Number

PI7903011

Type

Invention Patent

Filing

05/16/1979

Publication

-

Progress at the INPI

  1. Filing05/16/79
  2. Publication
  3. Examination
  4. Allowance06/01/82
  5. Grant
  6. Expired07/26/94

The letters patent expired on 07/26/1994: 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: 12/16/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

U. C. (pessoa física)

US

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Inventors

No inventors listed.

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.4

12/16/1986

RPI 843

Pedido de licença compulsória

#20.1

12/09/1986

RPI 842

Notificação para pagamento de retribuição

#13.1

09/21/1982

RPI 622

Deferimento

#9.1

06/01/1982

RPI 606

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. A classificação IPC anterior era F27D 23/02.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

07/26/1994

RPI 1234

Pedido de licença compulsória

#20.1

01/16/1990

RPI 1002

20.4

01/09/1990

RPI 1001

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