Patent US3689039A successfully refreshed from Google Patents.
US3689039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heating oxygen-containing gases
Assignee: EIDP Inc
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Filing: 1970-11-25
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Granted: 1972-09-05
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Expires: 1990-11-25
Abstract
Abstract An oxygen-containing gas is heated to a temperature between 1,200* and 1,800* C. to be used in oxidizing titanium chloride to titanium dioxide. The oxygen containing gas is first preheated by known means above the ignition temperature of a fuel used in a burner apparatus having a fuel nozzle. The oxygen-containing gas is then passed rectilinearly around the nozzle between 350 and 1,000 feet per second thereby preventing flame eddies. The oxygen-containing gas is commingled with fuel distribution by the nozzle in a combustion zone resulting in an elevation of the gas temperature and is then transferred to a reaction zone where the oxidation process takes place.
Inventors
- 👤 Arnold W Kilgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:23
CPC Classifications
C; C01; C01B; C01B13/00; C01B13/14; C01B13/20; C01B13/22
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
23 words
Claim 1 wherein the velocity of the oxygen-containing gases passing the tip of the nozzle is from 350 to 1,000 feet per second.
Claim 2
Dependent Claim
20 words
Claim 2 wherein the oxygen-containing gas is oxygen and less than 10 percent by weight is consumed in the combustion.
Claim 3
Dependent Claim
23 words
Claim 2 wherein the oxygen-containing gas is air and less than 25 percent by weight of the oxygen is consumed in the combustion.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |