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US4247331A
Expired / Lapsed
US
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Method for producing and storing sand coated with calcium chloride
Assignee: SOUTH LYON TRUCKING COMPANY INC A CORP OF MI
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Filing: 1978-10-05
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Granted: 1981-01-27
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Expires: 1998-10-05
Abstract
Abstract A method of storing sand coated with calcium chloride is disclosed which method comprises covering the sand with a plastic sheet which is then coated with a layer of plastic foam to protect the sand from moisture and to keep the cover in place.
Inventors
- 👤 Richard S. Hamlin
- 👤 Wayne L. Higgins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:40
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C09K3/185
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
A method for producing and storing sand coated with calcium chloride for treating ice covered highways comprising the steps of: (a) loading the sand into a hopper located over a feeder; (b) feeding and agitating the sand; (c) coating the agitating sand with a solution of calcium chloride and water; (d) conveying and weighing the coated sand; (e) piling the sand on the ground for storage; (f) covering the coated sand with a plastic sheet having a roughened outer surface; and (g) covering the roughened surface of said plastic sheet with a layer of polyurethane foam.
Claim 2
Independent Claim
96 words
A method for producing and storing sand coated with calcium chloride for treating ice covered highways comprising the steps of: (a) loading the sand into a hopper located over a feeder; (b) feeding and agitating the sand; (c) coating the agitating sand with a solution of calcium chloride and water; (d) conveying and weighing the coated sand; (e) piling the sand on the ground for storage; (f) covering the coated sand with a plastic sheet having a roughened outer surface; and (g) covering the roughened surface of said plastic sheet with a layer of polyurethane foam.
Claim 3
Dependent Claim
33 words
The method as defined in claim 1 wherein the plastic sheet is formed from a material selected from the group consisting of polyethylene, polyvinylchloride, coextruded polyvinylchloride and polyethelyne vinyl acetate, and mixtures thereof.
Claim 4
Dependent Claim
32 words
The method as defined in claim 1 including an additional step of metering and adjusting the flow of the calcium chloride and water solution in proportion to the weight of sand conveyed.
Claim 5
Dependent Claim
26 words
The method as defined in claim 1 wherein the foam is formed from a material selected from the group consisting of polyether urethane and polyester urethane.
Claim 6
Dependent Claim
32 words
The method of producing and storing sand coated with calcium chloride as defined in claim 1 wherein the solution of step (c) consists of 35% calcium chloride and 65% water by weight.
References Cited (Backward Citations)
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US2308289A
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US2410910A
Cited
US3989870A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |