Patent US2980620A successfully refreshed from Google Patents.
US2980620A
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Method of inhibiting ice melting salts and products for use in ice melting
Assignee: Hagan Chemicals and Controls Inc
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Filing: 1956-02-28
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Granted: 1961-04-18
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Expires: 1976-02-28
Abstract
No abstract record available.
Inventors
- 👤 George B Hatch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:04
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/18; C23F11/187; C23F11/188; C09; C09K; C09K3/00; C09K3/18; C09K3/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A NON-CORROSIVE COMPOSITION FOR MELTING ICE AND SNOW UNDER CONDITIONS WHEREBY CORROSION OF STEEL AND ALUMINUM ARE ORDINARILY CONCURRETLY ENCOUNTERED WHICH COMPOSITION CONSISTS PRINCIPALLY OF A FREEZING POINT DEPRESSANT SELECTED FROM THE GROUP CONSISTING OF AMMONIUM SULFATE, UREA, AND SODIUM NITRATE AND AT LEAST 0.2 PERCENT BY WEIGHT OF A WATER-SOLUBLE ALKALI-METAL MOLECULARLY DEHYDRATED PHOSPHATE AND AT LEAST THE CHEMICAL EQUIVALENT AMOUNT OF A WATER-SOLUBLE SALT, OTHER THAN THE CHLORIDES, OF A DIVALENT METAL SELECTED FROM THE GROUP CONDISTING OF ZINC, CALCIUM, AND STRONTIUM.
Claim 2
Dependent Claim
84 words
A NON-CORROSIVE COMPOSITION FOR MELTING ICE AND SNOW UNDER CONDITIONS WHEREBY CORROSION OF STEEL AND ALUMINUM ARE ORDINARILY CONCURRETLY ENCOUNTERED WHICH COMPOSITION CONSISTS PRINCIPALLY OF A FREEZING POINT DEPRESSANT SELECTED FROM THE GROUP CONSISTING OF AMMONIUM SULFATE, UREA, AND SODIUM NITRATE AND AT LEAST 0.2 PERCENT BY WEIGHT OF A WATER-SOLUBLE ALKALI-METAL MOLECULARLY DEHYDRATED PHOSPHATE AND AT LEAST THE CHEMICAL EQUIVALENT AMOUNT OF A WATER-SOLUBLE SALT, OTHER THAN THE CHLORIDES, OF A DIVALENT METAL SELECTED FROM THE GROUP CONDISTING OF ZINC, CALCIUM, AND STRONTIUM.
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) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |