US3751906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pollution controller
Assignee: Leas Brothers Development Corp Ind
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Filing: 1972-02-22
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Granted: 1973-08-14
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Expires: 1992-02-22
Abstract
Abstract A method for decreasing or eliminating exhaust emissions of nitrogen oxides, unburned hydrocarbons, carbon monoxides, or the like. The combustion temperature is maintained at a sufficiently low level to prevent the formation of nitrogen oxides. The exhaust gases are reacted with a metal oxide for the removal of contaminants, unburned hydrocarbons and carbon monoxide.
Inventors
- 👤 C Johnson
- 👤 L Leas
- 👤 R Leas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:46
CPC Classifications
F; F02; F02C; F02C3/00; F02C3/20; F02C3/30; F01; F01K; F01K23/00; F01K23/02; F01K23/06; F01K23/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
54 words
The method of claim 1 wherein the corrosion caused by a mixture of condensed water and sulfur dioxide is minimized or eliminated upon start-up and at temperatures wherein water can condense by the oxide removing the sulfur dioxide from the exhaust gases so that a mixture of condensed water and sulfur dioxide cannot form.
Claim 2
Dependent Claim
11 words
The method of claim 1 wherein the mUlti-valent metal is cobalt.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein the cooling fluid is vaporized, passed through a vapor turbine for added power generation, condensed and recycled.
Claim 4
Dependent Claim
19 words
The method of claim 1 wherein the clean exhaust gases are expanded through a gas turbine for power generation.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |