Title: Method of controlling and removing ice and snow from roads and bridges

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Claims: What is claimed is:

1. The method of control and/or removal of snow and ice on highways, bridges, and the like comprising applying calcium nitrite to such areas at the rate of 1-50 tons per two-lane mile.

2. The method according to claim 1 in which the amount is 10-20 tons per two-lane mile.

3. The method according to claim 1 wherein the roads and bridges are formed from hydraulic cement.
Other info:

Inventors: Rosenberg, Arnold M. (Potomac, MD, US)
Gaidis, James M. (Ellicott City, MD, US)

Application Number: 882461
Filing Date: 1978-03-01
Publication_date: 1979-05-08
Assignee: W. R. Grace & Co. (New York, NY)
Primary Class(es): 134/5 252/70
Other Classes:
US Patent Ref:

2681828	Jun, 1954	Pollard	134/5.
3227654	Jan, 1966	Standish et al.	252/70.
3384590	May, 1968	Eversole et al.	252/70.

Other Refs: 754074272462502077

Mar, 1967	CA
Dec, 1968	SU
Apr, 1976	SU

Primary Examiner: Fisher, Richard V.
Assistant Examiner:
Attorney: Troffkin; Howard J., McDowell, Jr.; William W.