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US4960531A
Expired / Lapsed
US
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Ice melter comprising an alpha-methyl glucoside and method of making same
Assignee: North American Salt Co
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Filing: 1989-05-05
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Granted: 1990-10-02
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Expires: 2009-05-05
Abstract
Abstract This invention relates to a composition for melting ice at low temperatures, particularly for use in melting ice from driveways, sidewalks and the like. The composition includes mixtures of the salts, sodium and potassium chloride, urea, and a chemical enhancer (synergist) or trigger. The enhancer which quickens melt rate and effects lower ice-melting temperatures may be an additional inorganic salt, such as a carbonate or another chloride, or an organic compound with ether or hydroxyl groupings such as saccharides, alcohols, glycols, and glucosides. The invention also includes the method of making the composition which includes the steps for example, of (1) preparing a warm solution of urea (2) spraying the potassium chloride portion of the salt combination with the urea solution, (3) drying the potassium chloride urea composition; (4) mixing said dried composition with the sodium chloride, and (5) adding the trigger.
Inventors
- 👤 Margaret B. Connor
- 👤 Joseph P. Tratnyek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:00
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C09K3/185
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
30 words
An ice melter composition for use on driveways, sidewalks and the like comprising: a salt combination and a trigger enhancing agent; said trigger comprising alpha-methyl glucoside of the formulation ##STR3##
Claim 2
Dependent Claim
30 words
An ice melter composition for use on driveways, sidewalks and the like comprising: a salt combination and a trigger enhancing agent; said trigger comprising alpha-methyl glucoside of the formulation ##STR3##
Claim 3
Dependent Claim
24 words
The ice melter of claim 1 wherein said trigger is present in amount of from about 1% to about 10% weight of the composition.
Claim 4
Dependent Claim
19 words
The ice melter composition of claim 2 wherein said salt combination comprises a mixture of sodium and potassium chloride.
Claim 5
Dependent Claim
19 words
The ice melter composition of claim 3 wherein said salt combination comprises a mixture of sodium and potassium chloride.
Claim 6
Dependent Claim
13 words
The ice melter composition of claim 4 wherein said salt combination includes urea.
Claim 7
Dependent Claim
48 words
The ice melter composition of claim 4 wherein said salt combination comprises from about 3 parts by weight of sodium chloride to about 1 part by weight of potassium chloride, to about one part by weight of sodium chloride to about 1 part by weight of potassium chloride.
Claim 8
Dependent Claim
24 words
The ice melter composition of claim 5 wherein said urea is present in from 1% to about 4% by weight of the salt combination.
Claim 9
Dependent Claim
69 words
An ice melter composition for use on driveways, side-walks and the like comprising: a salt combination comprising an approximately 50 --50 mixture by weight of sodium-potassium chloride, approximately 1% to 4% by weight of the salt combination of urea, and a trigger, said trigger comprising alpha-methyl glucoside of the formulation ##STR4## and being present in an amount of from about 1% to about 10% by weight of the composition.
Claim 10
Dependent Claim
69 words
An ice melter composition for use on driveways, side-walks and the like comprising: a salt combination comprising an approximately 50 --50 mixture by weight of sodium-potassium chloride, approximately 1% to 4% by weight of the salt combination of urea, and a trigger, said trigger comprising alpha-methyl glucoside of the formulation ##STR4## and being present in an amount of from about 1% to about 10% by weight of the composition.
Claim 11
Independent Claim
75 words
The method of making an ice melter composition including a salt combination of potassium chloride, sodium, chloride and urea and a trigger comprising the steps of: (1) preparing a warm solution of urea (2) spraying the potassium chloride portion of the salt combination with the urea solution, (3) drying the potassium chloride urea composition; (4) mixing said dried composition with the sodium chloride, and (5) adding as a trigger alpha-methyl glucoside of the formulation ##STR5##
Claim 12
Independent Claim
75 words
The method of making an ice melter composition including a salt combination of potassium chloride, sodium, chloride and urea and a trigger comprising the steps of: (1) preparing a warm solution of urea (2) spraying the potassium chloride portion of the salt combination with the urea solution, (3) drying the potassium chloride urea composition; (4) mixing said dried composition with the sodium chloride, and (5) adding as a trigger alpha-methyl glucoside of the formulation ##STR5##
Claim 13
Dependent Claim
25 words
The method of claim 9 wherein said trigger is present in an amount of from about 1% to about 10% by weight of the composition.
Claim 14
Dependent Claim
22 words
The method of claim 10 wherein said urea is present in about 1% to about 4% by weight of the salt combination.
Claim 15
Dependent Claim
20 words
The method of claim 10 wherein said salt combination comprises approximately 50--50 mixture by weight of sodium and potassium chloride.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-10-01 | 1994-04-02 | 1994-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-01 | 1998-04-02 | 1998-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-01 | 2002-04-02 | 2002-10-02 | $7700.00 | Window Closed / Lapsed |