Patent US3794472A successfully refreshed from Google Patents.
US3794472A
Expired / Lapsed
US
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Method for preventing the freezing together of coal particles
Assignee: ChampionX LLC
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Filing: 1972-12-11
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Granted: 1974-02-26
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Expires: 1992-12-11
Abstract
Abstract COAL PARTICLES ARE PREVENTED FROM FREEZING TOGETHER ANDD OR TO THE SURFACES OF COAL STORAGE CONTAINERS BY COATING EITHER THE COAL PARTICLES AND OR THE SURFACES OF SAID STORAGE CONTAINERS WITH A THIN FILM OF A COMPOSITION COMPRISING A HYDROCARBON LIQUID WHICH HAS EMULSIFIED THEREWITH FROM 5 TO 75% BY WEIGHT OF AN AQUEOUS SOLUTION OF A POLYHYDRIC ALCOHOL.
Inventors
- 👤 R Macaluso
- 👤 R Michalski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:13
CPC Classifications
B; B05; B05D; B05D5/00; B05D5/08; C; C10; C10L; C10L9/00; C10L9/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |