Patent US3298804A successfully refreshed from Google Patents.
US3298804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of freezing together of coal particles and compositions thereof
Assignee: ChampionX LLC
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Filing: 1965-01-14
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Granted: 1967-01-17
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Expires: 1985-01-14
Abstract
No abstract record available.
Inventors
- 👤 John F Schoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:44
CPC Classifications
C; C10; C10L; C10L9/00; C10L9/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR ANTI-FREEZE TREATMENT OF COAL WHICH COMPRISES SURFACE-COATING SMALL COAL PARTICLES WITH ABOUT 0.5 AND 5 GALLONS PER TON OF COAL OF A LIQUID HYDROCARBON HAVING A SOLIDIFICATION POINT AT LEAST AS LOW AS -20*F. AND CONTAINING A SMALL AMOUNT IN THE ORDER OF 300-8000 P.P.M. OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF (A) IMIDAZOLINES HAVING ON A RING CARBON A HYDROCARBON SUBSTITUENT WITH 6-35 CARBONS AND (B) QUATERNARY SALTS OF SAID IMIDAZOLINES.
Claim 2
Dependent Claim
77 words
A PROCESS FOR ANTI-FREEZE TREATMENT OF COAL WHICH COMPRISES SURFACE-COATING SMALL COAL PARTICLES WITH ABOUT 0.5 AND 5 GALLONS PER TON OF COAL OF A LIQUID HYDROCARBON HAVING A SOLIDIFICATION POINT AT LEAST AS LOW AS -20*F. AND CONTAINING A SMALL AMOUNT IN THE ORDER OF 300-8000 P.P.M. OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF (A) IMIDAZOLINES HAVING ON A RING CARBON A HYDROCARBON SUBSTITUENT WITH 6-35 CARBONS AND (B) QUATERNARY SALTS OF SAID IMIDAZOLINES.
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) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |