Patent US4400285A successfully refreshed from Google Patents.
US4400285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-activated exothermic chemical deicing formulations
Assignee: Individual
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Filing: 1982-04-12
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Granted: 1983-08-23
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Expires: 2002-04-12
Abstract
Abstract Chemical formulations containing calcium oxide, or unslaked calcined limestone, and a chemical deicing agent. The formulations liberate heat upon contacting ice or snow and materially assist the normal deicing function. Deicer options include calcium acetate, sodium acetate, magnesium acetate, and potassium acetate and sodium chloride (salt). The magnesium acetate containing formulation represents a special case in which the ultimate products formed are magnesium hydroxide and calcium acetate, both relatively harmless to the environment.
Inventors
- 👤 Alan B. Gancy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:59
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C09K3/185
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
17 words
A dry, water-activated exothermic chemical formulation containing calcium oxide, or calcined limestone, and a water-soluble acetate salt.
Claim 2
Dependent Claim
17 words
A dry, water-activated exothermic chemical formulation containing calcium oxide, or calcined limestone, and a water-soluble acetate salt.
Claim 3
Dependent Claim
12 words
The formulation of claim 1 wherein said acetate salt is calcium acetate.
Claim 4
Dependent Claim
12 words
The formulation of claim 1 wherein said acetate salt is calcium/magnesium acetate.
Claim 5
Dependent Claim
12 words
The formulation of claim 1 wherein said acetate salt is magnesium acetate.
Claim 6
Dependent Claim
12 words
The formulation of claim 1 wherein said acetate salt is sodium acetate.
Claim 7
Dependent Claim
12 words
The formulation of claim 1 wherein said acetate salt is potassium acetate.
Claim 8
Dependent Claim
27 words
The formulations of any one of claims 1-6 wherein the weight percent of active calcium oxide is greater than zero, but less than or equal to 50.
Claim 9
Dependent Claim
29 words
The formulations of any one of claims 1-7 wherein the finely divided components are thoroughly dry blended, and then pelletized or otherwise aggregated for economical application as surface deicers.
References Cited (Backward Citations)
DE2933318A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |