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Official data from INPI

COLETOR DE PO PARA PERFURATRIZ DE ROCHA

ConcedidaInvention Patent
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Application data

Number

PI7903199

Type

Invention Patent

Filing

05/23/1979

Publication

-
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Progress at the INPI

  1. Filing05/23/79
  2. Publication
  3. Examination
  4. Allowance04/03/84
  5. Grant10/30/84
  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.

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Latest action published by the INPI: 10/30/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

R. W. (pessoa física)

Inventors

R. W. (pessoa física)

Technical data

IPC Classification

E21C 7/02

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/30/1984

RPI 732

Notificação para pagamento de retribuição

#13.1

08/07/1984

RPI 720

Deferimento

#9.1

04/03/1984

RPI 702

Exigência - art. 36 da LPI

#6.1

09/27/1983

RPI 675

Exigência - art. 36 da LPI

#6.1

03/29/1983

RPI 649

Exigência - art. 36 da LPI

#6.1

03/16/1982

RPI 595

Carta-patente expirada

#21.1

07/26/1994

RPI 1234

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