US4824588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deicing agent
Assignee: REED LIGNIN Inc HIGHWAY 51 ROTHSCHILD WI 54474-1198 A CORP OF
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Filing: 1987-12-18
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Granted: 1989-04-25
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Expires: 2007-12-18
Abstract
Abstract A deicing composition comprising saccharinic acid, lignosulfonate and an alkali metal or alkaline earth metal chloride selected from among sodium chloride, magnesium chloride, calcium chloride and mixtures thereof, the ratio of said saccharinic acid, lignosulfonate and chloride being from about 0.05:0.95:15 to about 0.75:2.25:1. The composition has a pH value of from about 5.0 to 9.5. The saccharinic acid contemplated for use in the composition is isosaccharinic or metasaccharinic acid, or mixtures thereof. The saccharinic acid may be conveniently derived from the alkali treatment of monosaccharides and oligosaccharides inherently contained in spent sulfite liquor by heating at a temperature of 50° C. to 150° C., preferably at 80° C. to 100° C.
Inventors
- 👤 Stephen Y. Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:02
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
51 words
A deicing composition comprising a mixture of saccharinic acid, lignosulfonate and an alkali metal or alkaline earth metal chloride salt selected from the group consisting of sodium chloride, magnesium chloride, calcium chloride, and mixtures thereof, the ratio of said saccharinic acid, lignosulfonate and chloride being from about 0.05:0.95:15 to about 0.75:2.25:1.
Claim 2
Dependent Claim
51 words
A deicing composition comprising a mixture of saccharinic acid, lignosulfonate and an alkali metal or alkaline earth metal chloride salt selected from the group consisting of sodium chloride, magnesium chloride, calcium chloride, and mixtures thereof, the ratio of said saccharinic acid, lignosulfonate and chloride being from about 0.05:0.95:15 to about 0.75:2.25:1.
Claim 3
Dependent Claim
21 words
The composition of claim 1 wherein said lignosulfonate is in the form of a sodium, calcium, magnesium, potassium or ammonium salt.
Claim 4
Dependent Claim
14 words
The composition of claim 1 wherein said saccharinic acid is isosaccharinic or metasaccharinic acid.
Claim 5
Dependent Claim
21 words
The composition of claim 1 wherein said saccharinic acid is derived from alkali treatment of corn stalks, molasses, bagasse or straw.
Claim 6
Dependent Claim
28 words
The composition of claim 1 wherein said saccharinic acid is derived from alkali treatment of sugars produced by saccharification of woody plants and other vegetation with mineral acids.
Claim 7
Dependent Claim
23 words
The composition of claim 1 wherein said saccharinic acid is derived from alkali treatment of wood sugars and oligosaccharides in spent sulfite liquor.
Claim 8
Dependent Claim
70 words
A process for deicing a road surface comprising the step of applying to said surface an effective amount of a deicing composition comprising a mixture of saccharinic acid, lignosulfonate and an alkali metal or alkaline earth metal chloride salt selected from the group consisting of sodium chloride, magnesium chloride, calcium chloride, and mixtures thereof, the ratio of said saccharinic acid, lignosulfonate and chloride being from about 0.05:0.95:15 to about 0.75:2.25:1.
Claim 9
Dependent Claim
70 words
A process for deicing a road surface comprising the step of applying to said surface an effective amount of a deicing composition comprising a mixture of saccharinic acid, lignosulfonate and an alkali metal or alkaline earth metal chloride salt selected from the group consisting of sodium chloride, magnesium chloride, calcium chloride, and mixtures thereof, the ratio of said saccharinic acid, lignosulfonate and chloride being from about 0.05:0.95:15 to about 0.75:2.25:1.
Claim 10
Dependent Claim
13 words
The process of claim 7 wherein said mixture is applied in dry form.
Claim 11
Dependent Claim
12 words
The process of claim 7 wherein said mixture is applied in solution.
Claim 12
Dependent Claim
21 words
The process of claim 7 wherein said lignosulfonate is in the form of a sodium, calcium, magnesium, potassium or ammonium salt.
Claim 13
Dependent Claim
14 words
The process of claim 7 wherein said saccharinic acid is isosaccharinic or metasaccharinic acid.
Claim 14
Dependent Claim
16 words
The process of claim 7 wherein pH of the mixture is from about 5 to 9.5.
Claim 15
Dependent Claim
21 words
The process of claim 7 wherein said saccharinic acid is derived from alkali treatment of corn stalks, molasses, bagasse or straw.
Claim 16
Dependent Claim
28 words
The process of claim 7 wherein said saccharinic acid is derived from alkali treatment of sugars produced by saccharification of woody plants and other vegetation with mineral acids.
Claim 17
Dependent Claim
23 words
The process of claim 7 wherein said saccharinic acid is derived from alkali treatment of wood sugars and oligosaccharides in spent sulfite liquor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |