Method for casting a concrete product

Plastic and nonmetallic article shaping or treating: processes – Forming structural installations in situ – Repositioning or moving mold to form sequential portions of...

Reexamination Certificate

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Details

C264S034000, C264S040100, C264S040400, C264S209100, C264S211110, C264S333000, C425S062000, C425S063000, C425S064000, C425S145000, C425S147000, C425S148000

Reexamination Certificate

active

06969476

ABSTRACT:
A method is disclosed for casting a concrete product using two or more different grades of concrete mix, in which method predetermined amounts of different grades of concrete mix are delivered at appropriate instants into the feeder hopper of the slip-form casting machine.

REFERENCES:
patent: 2607579 (1952-08-01), Noble
patent: 3292227 (1966-12-01), Olds
patent: 3429130 (1969-02-01), Feiner et al.
patent: 3608011 (1971-09-01), Jones
patent: 3623708 (1971-11-01), Futty et al.
patent: 4073592 (1978-02-01), Godberson et al.
patent: 4310293 (1982-01-01), Eggleton
patent: 4526493 (1985-07-01), Hall et al.
patent: 4773838 (1988-09-01), Seppanen
patent: 5023030 (1991-06-01), Rantanen
patent: 5879104 (1999-03-01), Ulrich
patent: 3502861 (1986-07-01), None
patent: 991165 (2000-11-01), None
patent: 2 302 817 (1997-02-01), None
patent: 06321611 (1994-11-01), None
patent: WO 00/71315 (2000-11-01), None
Derwent Abstract of DE 3502861 A; 1986; Derwent Information Limited; Derwent Week # 198632.

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