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Official data from INPI

COMPOSIÇÃO POLIMÉRICA TERMOPLÁSTICA DIFUSORA DE LUZ, E, PROCESSO DE PREPRAÇÃO DE UMA COMPOSIÇÃO POLIMÉRICA EM PARTÍCULAS

PublicadaInvention Patent

Application data

Number

PI8706147

Type

Invention Patent

Filing

11/16/1987

Publication

06/21/1988

Progress at the INPI

  1. Filing11/16/87
  2. Publication06/21/88
  3. Examination09/18/90
  4. Allowance10/26/93
  5. Grant05/31/94
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 06/21/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Elf Atochem S.A.

FR

Rohm And Haas Company

US

Rohm and Haas Credit Corporation Company

US

See this company's full portfolio

Inventors

J. W. (pessoa física)

US

W. W. (pessoa física)

US

Technical data

Priority claims

US

932.133 · 11/18/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

06/21/1988

RPI 922

Pedido de patente depositado

#2.1

03/01/1988

RPI 906

Carta-patente expirada

#21.1

Patente extinta em 16/11/2002

07/29/2008

RPI 1960

Transferência deferida

#25.1

Transferido de: Rohm and Haas Credit Corporation

04/10/2001

RPI 1579

Republicação - titular

#25.11

Transferido de: Rohm and Haas Company. Ref. RPI 1572 de 20/02/2001. Cód. 25.1, item (71)

03/20/2001

RPI 1576

Transferência deferida

#25.1

Transferido de Rohm and Haas Company.

02/20/2001

RPI 1572

Concessão da patente

#16.1

05/31/1994

RPI 1226

Deferimento

#9.1

10/26/1993

RPI 1195

Exigência - art. 36 da LPI

#6.1

06/02/1992

RPI 1122

Solicitação de exame técnico

#4.1

09/18/1990

RPI 1033

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