US3928221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Snow and ice control compositions
Assignee: S & P INVESTMENTS CORP A CORP OF
•
Filing: 1973-08-15
•
Granted: 1975-12-23
•
Expires: 1993-08-15
Abstract
Abstract A biodegradable, aqueous, snow and ice control composition, having as active ingredient a mixture of urea, ethylene glycol and methanol and possessing a salting out temperature (SOT) down to about -40*C (-40*F) is provided for maintaining roads, airport runways and strip mining soil surfaces free of ice and snow for extended periods.
Inventors
- 👤 Jack D Slater
- 👤 William G H Latham
- 👤 Robert H Farrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:05
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C09K3/185
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
73 words
AN AQUEOUS SNOW AND ICE CONTROL COMPOSITION CONTAINING AS ACTIVE INGREDIENT A MIXTURE OF ABOUT 23 TO ABOUT 25% BY WEIGHT UREA, ABOUT 11 TO ABOUT 15% BY WEIGHT ETHYLENE GLYCOL ABOUT 35 TO ABOUT 40% BY WEIGHT METHANOL, BALANCE WATER, WITH A SUFFICIENT QUANTITY OF ALKALI TO ADJUST THE PH OF THE COMPOSITION FROM ABOUT 8.1 TO ABOUT 8.4, CHARACTERIZED BY A SALTING OUT TEMPERATURE RANGE OF ABOUT -30*C TO ABOUT -40*C.
Claim 2
Dependent Claim
73 words
AN AQUEOUS SNOW AND ICE CONTROL COMPOSITION CONTAINING AS ACTIVE INGREDIENT A MIXTURE OF ABOUT 23 TO ABOUT 25% BY WEIGHT UREA, ABOUT 11 TO ABOUT 15% BY WEIGHT ETHYLENE GLYCOL ABOUT 35 TO ABOUT 40% BY WEIGHT METHANOL, BALANCE WATER, WITH A SUFFICIENT QUANTITY OF ALKALI TO ADJUST THE PH OF THE COMPOSITION FROM ABOUT 8.1 TO ABOUT 8.4, CHARACTERIZED BY A SALTING OUT TEMPERATURE RANGE OF ABOUT -30*C TO ABOUT -40*C.
Claim 3
Dependent Claim
25 words
Composition of claim 1, where an anticorrosion agent is added in a quantity equivalent to about 0.2 to 2% by weight of the active ingredient.
Claim 4
Dependent Claim
22 words
Composition of claim 2, wherein the anticorrosion agent is a mixture of sodium oleate and the sodium salt of sulfonated oleic acid.
Claim 5
Dependent Claim
22 words
Composition of claim 3, wherein the mixture contains about 30% by weight sodium oleate, balance the sodium salt of sulfonated oleic acid.
Claim 6
Dependent Claim
8 words
Composition of claim 1, in admixture with sand.
Claim 7
Dependent Claim
8 words
Composition of claim 1 in admixture with gravel.
Claim 8
Dependent Claim
84 words
A process for controlling snow and ice on surfaces selected from roads, airport runways, strip mining soils, stockpiles of ores and coal which comprises applying to the surface an aQueous composition containing as active ingredient a mixture of about 23 to about 25% by weight urea, about 11 to about 15% by weight ethylene glycol, about 35 to about 40% by weight methanol, balance water, with a sufficient quantity of alkali to adjust the pH of the composition from about 8.1 to about 8.4.
Claim 9
Dependent Claim
84 words
A process for controlling snow and ice on surfaces selected from roads, airport runways, strip mining soils, stockpiles of ores and coal which comprises applying to the surface an aQueous composition containing as active ingredient a mixture of about 23 to about 25% by weight urea, about 11 to about 15% by weight ethylene glycol, about 35 to about 40% by weight methanol, balance water, with a sufficient quantity of alkali to adjust the pH of the composition from about 8.1 to about 8.4.
Claim 10
Dependent Claim
27 words
Process of claim 7, wherein the composition contains from about 0.2 to about 2% by weight, based on the weight of the active ingredient, an anticorrosion agent.
Claim 11
Dependent Claim
22 words
Process of claim 8, wherein the anticorrosion agent is a mixture of sodium oleate and the sodium salt of sulfonated oleic acid.
Claim 12
Dependent Claim
76 words
A process for controlling snow and ice on road surfaces which comprises applying to the surfaces sand in combination with a composition containing as active ingredient a mixture of about 23 to about 25% by weight urea, about 11 to about 15% by weight ethylene glycol, about 35 to about 40% by weight methanol, balance water with a sufficient quantity of an alkali to adjust the pH of the composition from about 8.1 to about 8.4.
Claim 13
Dependent Claim
76 words
A process for controlling snow and ice on road surfaces which comprises applying to the surfaces sand in combination with a composition containing as active ingredient a mixture of about 23 to about 25% by weight urea, about 11 to about 15% by weight ethylene glycol, about 35 to about 40% by weight methanol, balance water with a sufficient quantity of an alkali to adjust the pH of the composition from about 8.1 to about 8.4.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |