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Official data from INPI

PORTA REGULADORA DA DESCARGA DE MATERIAL PARA TAMBOR ROTATIVO

Em AnáliseInvention Patent

Application data

Number

PI7803295

Type

Invention Patent

Filing

07/12/1977

Publication

-

Progress at the INPI

  1. Filing07/12/77
  2. Publication
  3. Examination
  4. Allowance09/21/82
  5. Grant04/26/83
  6. Expired11/30/93

The letters patent expired on 11/30/1993: 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: 04/02/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

CHICAGO BRIDGE & IRON CO

Inventors

R. R. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Cessão de direito de exploração

#22.1

04/02/1985

RPI 754

Concessão da patente

#16.1

04/26/1983

RPI 653

Notificação para pagamento de retribuição

#13.1

01/25/1983

RPI 640

Deferimento

#9.1

09/21/1982

RPI 622

Exigência - art. 36 da LPI

#6.1

03/02/1982

RPI 593

Carta-patente expirada

#21.1

11/30/1993

RPI 1200

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