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Official data from INPI

PROCESSO PARA A POLIMERIZACAO EM SUSPENSAO DE CLORETO DE VINILA MONOMERICA

ConcedidaInvention Patent

Application data

Number

PI7605998

Type

Invention Patent

Filing

09/11/1975

Publication

-

Progress at the INPI

  1. Filing09/11/75
  2. Publication
  3. Examination
  4. Allowance01/05/82
  5. Grant10/26/82
  6. Expired07/20/93

The letters patent expired on 07/20/1993: 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: 10/26/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

SHINETSU CHEMICAL CO

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Inventors

K. K. (pessoa física)

K. S. (pessoa física)

O. K. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/26/1982

RPI 627

Notificação para pagamento de retribuição

#13.1

05/04/1982

RPI 602

Deferimento

#9.1

01/05/1982

RPI 585

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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