Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing
Reexamination Certificate
2007-08-21
2007-08-21
Marcantoni, Paul (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Inorganic settable ingredient containing
C106S713000, C106S756000, C106S757000, C241S024100, C241S029000
Reexamination Certificate
active
11130272
ABSTRACT:
A method for recycling concrete waste includes the steps of: a) heating the concrete waste to provide a measure of fragility to the concrete waste; b) milling and sieving the heated concrete waste to separate coarse aggregate from the concrete waste; and c) milling and sieving a remaining portion of the concrete waste remaining after separation of the coarse aggregate to separate the remaining portion of the concrete waste into a cement-containing fraction and fine aggregate.
REFERENCES:
patent: 4239547 (1980-12-01), McBee et al.
Answer 14 to 28 Chemical Abstracts on STN□□JP 2003261905 (Kuroda et al.) Sep. 19, 2003 abstract only.
Answer 16 of 28 Chemical Abstracts on STN□□JP 2003183063 (Hashimoto et al.) Jul. 3, 2003 abstract only.
“Preparation of reclaimed cement from waste concrete”, Kojima et al., Gypsum and Lime (1993), 244, 153-163.□□□□Answer 89 of 117 of Chemical Abstracts on STN (see one page abstract only).
Answer 12 of 28 of Chemical Abstracts on STN□□“Recovery of fine aggregate and cement hydrate powder from fine waste concrete by multigravity separator”,□□Hirajima et al., Shigen to Sozai (2003), 119(9), 553-558.
Chang Cheng-Mao
Foley & Lardner LLP
Marcantoni Paul
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