Official data from INPI

APERFEICOADO MATERIAL DE FRICCAO RESISTENTE AO CALOR E AO DESGASTE

ConcedidaInvention Patent

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Application data

Number

PI7901388

Type

Invention Patent

Filing

05/10/1978

Publication

View on INPI

Progress at the INPI

Filing05/10/78
Publication
Examination
Allowance08/04/87
Grant09/27/88
Expired06/21/94

The letters patent expired on 06/21/1994: 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: 09/27/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

MOLDED MATERIALS CO

Inventors

J. G. (pessoa física)

S. W. (pessoa física)

Technical data

IPC Classification

C08K 3/28 C08K 3/30 C08K 7/00 C08K 7/04 C08L 21/00 C08L 33/00 C08L 33/02 C08L 61/00 C08L 61/04 C08L 61/06 C08L 61/10 C08L 7/00 C08L 9/06 F16D 69/02

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/27/1988

RPI 936

110

06/28/1988

RPI 923

Recurso

#12.1

11/24/1987

RPI 892

Republicação - classificação IPC

#15.11

09/01/1987

RPI 880

Deferimento

#9.1

08/04/1987

RPI 876

Conhecimento de parecer técnico

#7.1

10/18/1983

RPI 678

6.2

04/13/1982

RPI 599

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

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