US3004836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of slag formation in coalfired furnaces, boilers and the like
Assignee: ChampionX LLC
•
Filing: 1958-08-13
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Granted: 1961-10-17
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Expires: 1978-08-13
Abstract
No abstract record available.
Inventors
- 👤 Thompson Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:31
CPC Classifications
C; C23; C23F; C23F15/00; C23F15/005; F; F28; F28G; F28G9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A COMPOSITION USEFUL IN SLAG PREVENTION IN COALFIRED FURNACES COMPRISING A MIXTURE OF SMALL, DENSE PARTICLES OF AN AVERAGE PARTICLE SIZE IN THE RANGE OF 0.001 TO 0.05 INCH OF 50-80% BY WEIGHT OF MAGNESIUM OXIDE PARTICLES OBTAINED BY THE CALCINATION OF A MEMBER OF THE GROUP CONSISTING OF MAGNESIUM ORE AND AMORPHOUS MAGNESIUM HYDROXIDE AND 20-50% BY WEIGHT OF ALKALINE EARTH PHOSPHATE SALT PARTICLES.
Claim 2
Dependent Claim
65 words
A COMPOSITION USEFUL IN SLAG PREVENTION IN COALFIRED FURNACES COMPRISING A MIXTURE OF SMALL, DENSE PARTICLES OF AN AVERAGE PARTICLE SIZE IN THE RANGE OF 0.001 TO 0.05 INCH OF 50-80% BY WEIGHT OF MAGNESIUM OXIDE PARTICLES OBTAINED BY THE CALCINATION OF A MEMBER OF THE GROUP CONSISTING OF MAGNESIUM ORE AND AMORPHOUS MAGNESIUM HYDROXIDE AND 20-50% BY WEIGHT OF ALKALINE EARTH PHOSPHATE SALT PARTICLES.
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) | 1964-10-16 | 1965-04-17 | 1965-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-16 | 1969-04-17 | 1969-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-16 | 1973-04-17 | 1973-10-17 | $7700.00 | Window Closed / Lapsed |