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Official data from INPI

FILTRO DE VACUO DE DISCO ROTATIVO

ConcedidaInvention Patent

Application data

Number

PI7808661

Type

Invention Patent

Filing

06/08/1977

Publication

-

Progress at the INPI

  1. Filing06/08/77
  2. Publication
  3. Examination03/09/82
  4. Allowance03/15/88
  5. Grant11/29/88
  6. Expired05/31/94

The letters patent expired on 05/31/1994: 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: 11/29/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ENVIROTECH CORP

Inventors

D. S. (pessoa física)

H. R. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

11/29/1988

RPI 945

Notificação para pagamento de retribuição

#13.1

07/19/1988

RPI 926

Deferimento

#9.1

03/15/1988

RPI 908

Exigência - art. 36 da LPI

#6.1

09/01/1987

RPI 880

Conhecimento de parecer técnico

#7.1

07/15/1986

RPI 821

11.8

04/02/1985

RPI 754

Solicitação de exame técnico

#4.1

04/02/1985

RPI 754

Arquivamento - Art. 33 da LPI

#11.1

09/28/1982

RPI 623

4.1.1

05/11/1982

RPI 603

Solicitação de exame técnico

#4.1

03/09/1982

RPI 594

Carta-patente expirada

#21.1

05/31/1994

RPI 1226

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