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Official data from INPI

MEMBRANA SINTETICA ANISOTROPICA ALTAMENTE PERMEAVEL E PROCESSO DE SUA PREPARACAO

ConcedidaInvention Patent

Application data

Number

PI7806967

Type

Invention Patent

Filing

10/21/1977

Publication

-

Progress at the INPI

  1. Filing10/21/77
  2. Publication
  3. Examination
  4. Allowance02/14/84
  5. Grant07/31/84
  6. Expired05/24/94

The letters patent expired on 05/24/1994: 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: 07/31/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

UNISEARCH LTD

Inventors

F. C. (pessoa física)

L. M. (pessoa física)

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/31/1984

RPI 719

Notificação para pagamento de retribuição

#13.1

06/05/1984

RPI 711

Deferimento

#9.1

02/14/1984

RPI 695

Exigência - art. 36 da LPI

#6.1

08/02/1983

RPI 667

Republicação - classificação IPC

#15.11

01/11/1983

RPI 638

Exigência - art. 36 da LPI

#6.1

10/26/1982

RPI 627

6.2

12/29/1981

RPI 584

Carta-patente expirada

#21.1

05/24/1994

RPI 1225

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