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Official data from INPI

DISPOSITIVO PARA A PREPARACAO DE MATERIAL SINTETICO TERMOPLASTICO

Em AnáliseInvention Patent

Application data

Number

PI7901126

Type

Invention Patent

Filing

03/02/1978

Publication

-

Progress at the INPI

  1. Filing03/02/78
  2. Publication
  3. Examination12/29/81
  4. Allowance08/10/82
  5. Grant02/22/83
  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: 08/02/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

K. A. (pessoa física)

Inventors

B. H. (pessoa física)

S. H. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.11

08/02/1988

RPI 928

Pedido de licença compulsória

#20.1

07/12/1988

RPI 925

Concessão da patente

#16.1

02/22/1983

RPI 644

Deferimento

#9.1

08/10/1982

RPI 616

Solicitação de exame técnico

#4.1

12/29/1981

RPI 584

Carta-patente expirada

#21.1

05/31/1994

RPI 1226

Pedido de licença compulsória

#20.1

11/12/1991

RPI 1093

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