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Official data from INPI

PROCESSO PARA ELEVAR O PESO MOLECULAR

ConcedidaInvention Patent
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Application data

Number

PI7900267

Type

Invention Patent

Filing

01/17/1978

Publication

-
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Progress at the INPI

  1. Filing01/17/78
  2. Publication
  3. Examination
  4. Allowance07/19/83
  5. Grant01/31/84
  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.

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Latest action published by the INPI: 01/31/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

WACKER CHEMIE GMBH

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Inventors

D. B. (pessoa física)

E. N. (pessoa física)

Technical data

IPC Classification

C07F 7/18

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

01/31/1984

RPI 693

Notificação para pagamento de retribuição

#13.1

11/16/1983

RPI 682

Deferimento

#9.1

07/19/1983

RPI 665

Exigência - art. 36 da LPI

#6.1

11/30/1982

RPI 632

6.2

02/16/1982

RPI 591

Carta-patente expirada

#21.1

05/31/1994

RPI 1226

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