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Official data from INPI

ARTIGO REVESTIDO COM ACABAMENDE FLUOROPOLIMERO APERFEICOADO

ConcedidaInvention Patent

Application data

Number

PI7909035

Type

Invention Patent

Filing

10/03/1979

Publication

-

Progress at the INPI

  1. Filing10/03/79
  2. Publication
  3. Examination06/08/82
  4. Allowance01/10/84
  5. Grant06/26/84
  6. Expired05/09/95

The letters patent expired on 05/09/1995: 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: 06/26/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DU PONT

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Inventors

E. V. (pessoa física)

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/26/1984

RPI 714

Notificação para pagamento de retribuição

#13.1

05/02/1984

RPI 706

Republicação - classificação IPC

#15.11

02/28/1984

RPI 697

Deferimento

#9.1

01/10/1984

RPI 690

Solicitação de exame técnico

#4.1

06/08/1982

RPI 607

Carta-patente expirada

#21.1

05/09/1995

RPI 1275

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