US2844112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inhibiting slag formation in boilers and inhibitor materials for use therein
Assignee: National Cylinder Gas Co
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Filing: 1953-01-02
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Granted: 1958-07-22
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Expires: 1973-01-02
Abstract
No abstract record available.
Inventors
- 👤 Muller Nathan William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:55
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/04; C10L1/00; C10L1/10; C10L1/12; C10L1/1233; C10L1/14; C10L1/18; C10L1/1814; C10L1/188
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
METHOD OF INHIBITING THE FORMATION OF SLAG ON THE FIRESIDES OF BOILERS, WHICH COMPRISES ENTRAINING IN THE BOILER FLUE GAS STREAM RESULTING FROM THE COMBUSTION OF FUEL IN THE BOILER AT LEAST ONE BASIC METALLIC OXIDE LESS BASIC THAN OXIDES OF ALKALI METALS IN COMBINATION WITH AT LEAST ONE AMPHOTERIC METALLIC OXIDE THAT IN ITS HIGHER VALENCE STATE FORMS AN ACIDIC ANHYDRIDE CAPABLE OF DISPLACING SULFUR TRIOXIDE FROM SODIUM SULFATE AT ELEVATED TEMPERATURES, SAID OXIDES BEING PRESENT IN SAID BOILER FLUE GASES IN SUBSTANTIALLY EQUAL MOLECULAR QUANTITIES, THE TOTAL QUANTITY OF SAID OXIDES BEING FORM 1 TO 100 PARTS PER MILLION PARTS OF THE FUEL.
Claim 2
Dependent Claim
105 words
METHOD OF INHIBITING THE FORMATION OF SLAG ON THE FIRESIDES OF BOILERS, WHICH COMPRISES ENTRAINING IN THE BOILER FLUE GAS STREAM RESULTING FROM THE COMBUSTION OF FUEL IN THE BOILER AT LEAST ONE BASIC METALLIC OXIDE LESS BASIC THAN OXIDES OF ALKALI METALS IN COMBINATION WITH AT LEAST ONE AMPHOTERIC METALLIC OXIDE THAT IN ITS HIGHER VALENCE STATE FORMS AN ACIDIC ANHYDRIDE CAPABLE OF DISPLACING SULFUR TRIOXIDE FROM SODIUM SULFATE AT ELEVATED TEMPERATURES, SAID OXIDES BEING PRESENT IN SAID BOILER FLUE GASES IN SUBSTANTIALLY EQUAL MOLECULAR QUANTITIES, THE TOTAL QUANTITY OF SAID OXIDES BEING FORM 1 TO 100 PARTS PER MILLION PARTS OF THE FUEL.
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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |