US3402015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple stage treatment of a noxious stream with cyclic high quantities of nitrogen oxides
Assignee: Universal Oil Products Co
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Filing: 1965-10-14
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Granted: 1968-09-17
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Expires: 1985-10-14
Abstract
No abstract record available.
Inventors
- 👤 Leslie C Hardison
- 👤 James M Barr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:37
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9481
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A METHOD FOR TREATING A NOXIOUS DISCHARGE STREAM HAVING A CYCLIC HIGH QUANTITY OF NITROGEN OXIDES CONTENT THEREIN TO ELIMINATE AIR POLLUTION, WHICH COMPRISES, PASSING SUCH STREAM PRIOR TO ANY CATALYSTIC DECOMPOSITION INTO CONTACT WITH A BED OF NITROGEN OXIDES ADSORPTION MATERIAL PROVIDED IN AN AMOUNT EFFECTING CONTROLLED ADSORPTION OF A MAJOR PORTION O THE NITROGEN OXIDES CONCENTRATIONS IN SUCH STREAM, MAINTAINING CONTINUED FLOW OF SAID DISCHARGE STEAM THROUGH THE ADSORPTION BED AND PROVIDING FOR NITROGEN OXIDES RELEASE AND DESORPTION FROM THE BED DURING PERIODS OF LOW NITROGEN OXIDES CONCENTRATIONS, AND SUBSEQUENTLY CONTINUOUSLY PASSING THE THUSLY CONTACTED STREAM WITH A RESULTING AVERAGED NITROGEN OXIDES CONCENTRATION SUBSTANTIALLY LESS THAN SAID MAXIMUM NITROGEN OXIDES CONCENTRATIONS INTO CONTACT WITH AT LEAST ONE STAGE OF OXIDIZING CATALYST IN THE PRESENCE OF AN ADED REDUCING FUEL, WHEREBY TO DISCHARGE A NON-NOXIOUS TREATED STREAM.
Claim 2
Independent Claim
138 words
A METHOD FOR TREATING A NOXIOUS DISCHARGE STREAM HAVING A CYCLIC HIGH QUANTITY OF NITROGEN OXIDES CONTENT THEREIN TO ELIMINATE AIR POLLUTION, WHICH COMPRISES, PASSING SUCH STREAM PRIOR TO ANY CATALYSTIC DECOMPOSITION INTO CONTACT WITH A BED OF NITROGEN OXIDES ADSORPTION MATERIAL PROVIDED IN AN AMOUNT EFFECTING CONTROLLED ADSORPTION OF A MAJOR PORTION O THE NITROGEN OXIDES CONCENTRATIONS IN SUCH STREAM, MAINTAINING CONTINUED FLOW OF SAID DISCHARGE STEAM THROUGH THE ADSORPTION BED AND PROVIDING FOR NITROGEN OXIDES RELEASE AND DESORPTION FROM THE BED DURING PERIODS OF LOW NITROGEN OXIDES CONCENTRATIONS, AND SUBSEQUENTLY CONTINUOUSLY PASSING THE THUSLY CONTACTED STREAM WITH A RESULTING AVERAGED NITROGEN OXIDES CONCENTRATION SUBSTANTIALLY LESS THAN SAID MAXIMUM NITROGEN OXIDES CONCENTRATIONS INTO CONTACT WITH AT LEAST ONE STAGE OF OXIDIZING CATALYST IN THE PRESENCE OF AN ADED REDUCING FUEL, WHEREBY TO DISCHARGE A NON-NOXIOUS TREATED STREAM.
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) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |