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Official data from INPI

COMPOSICAO DE CIMENTO E PROCESSO DE CIMENTACAO DE TUBOS EM UM ORIFICIO PERFURADO

ConcedidaInvention Patent

Application data

Number

PI7606237

Type

Invention Patent

Filing

09/20/1976

Publication

-

Progress at the INPI

  1. Filing09/20/76
  2. Publication
  3. Examination
  4. Allowance
  5. Grant07/27/82
  6. Expired07/20/93

The letters patent expired on 07/20/1993: 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: 07/27/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

S. I. (pessoa física)

Inventors

M. W. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/27/1982

RPI 614

Notificação para pagamento de retribuição

#13.1

12/29/1981

RPI 584

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: C09K 7/04; C04B 7/00.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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