Patent US3297577A successfully refreshed from Google Patents.
US3297577A
Expired / Lapsed
US
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Chemical deicer
Assignee: Standard Oil Co
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Filing: 1963-12-12
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Granted: 1967-01-10
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Expires: 1983-12-12
Abstract
No abstract record available.
Inventors
- 👤 Norman W Standish
- 👤 Walter R Tuuri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:14
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C09K3/185; C23; C23F; C23F11/00; C23F11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A DEICER COMPOSITION SUBSTANTIALLY FREE OF CHLORIDE IONS COMPRISING AN INTIMATE MIXTURE OF FROM 10 TO 45% BY WEIGHT OF UREA, FROM 90 TO 55% BY WEIGHT OF AMMONIUM NITRATE AND FROM 0.001 TO ABOUT 10 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF COMBINED UREA AND AMMONIUM NITRATE OF A CORROSION INHIBITOR FOR SURFACES CONTAINING CADMIUM SELECTED FROM THE GROUP CONSISTING OF AMMONIUM AND ALKALI METAL SULFIDES, SODIUM DITHIONATE, POTASSIUM SULFITE, SODIUM BISULFITE, THIOUREA, THIOACETAMIDE, DITHIOBIURET, ALKALI METAL AND AMMONIUM CARBONATES AND ALKALI METAL AND AMMONUM BICARBONATES.
Claim 2
Dependent Claim
89 words
A DEICER COMPOSITION SUBSTANTIALLY FREE OF CHLORIDE IONS COMPRISING AN INTIMATE MIXTURE OF FROM 10 TO 45% BY WEIGHT OF UREA, FROM 90 TO 55% BY WEIGHT OF AMMONIUM NITRATE AND FROM 0.001 TO ABOUT 10 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF COMBINED UREA AND AMMONIUM NITRATE OF A CORROSION INHIBITOR FOR SURFACES CONTAINING CADMIUM SELECTED FROM THE GROUP CONSISTING OF AMMONIUM AND ALKALI METAL SULFIDES, SODIUM DITHIONATE, POTASSIUM SULFITE, SODIUM BISULFITE, THIOUREA, THIOACETAMIDE, DITHIOBIURET, ALKALI METAL AND AMMONIUM CARBONATES AND ALKALI METAL AND AMMONUM BICARBONATES.
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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |