US3008796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of purifying gases containing oxygen and oxides of nitrogen
Assignee: Engelhard Industries Inc
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Filing: 1958-06-05
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Granted: 1961-11-14
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Expires: 1978-06-05
Abstract
No abstract record available.
Inventors
- 👤 Holger C Andersen
- 👤 Carl D Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:18
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8621; B01D53/8625; B01D53/8628; B01J; B01J23/00; B01J23/70; B01J37/00; B01J37/02; B01J37/0201
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR EFFECTING SELECTING REDUCTION REACTIONS OF GASES CONTAINING A TRACE TO 22 PERCENT OXYGEN, TRACE TO 2 PERCENT OF NITRIC OXIDE, TRACE TO 2 PERCENT OF NITROGEN DIOXIDE, AND THE REMAINDER AN INSERT GAS, WHICH COMPRISES CONTACTING IN A REACTION ZONE AN ADMIXTURE OF GASES AND AMMONIA AT REACTION TEMPERATURE WITH A CATALYST SELECTED FROM THE GROUP CONSISTING OF COLBALT, NICKEL AND IRON, WHEREBY SELECTIVE REDUCTION OF THE OXIDES OF NITROGEN IS EFFECTED.
Claim 2
Dependent Claim
75 words
A PROCESS FOR EFFECTING SELECTING REDUCTION REACTIONS OF GASES CONTAINING A TRACE TO 22 PERCENT OXYGEN, TRACE TO 2 PERCENT OF NITRIC OXIDE, TRACE TO 2 PERCENT OF NITROGEN DIOXIDE, AND THE REMAINDER AN INSERT GAS, WHICH COMPRISES CONTACTING IN A REACTION ZONE AN ADMIXTURE OF GASES AND AMMONIA AT REACTION TEMPERATURE WITH A CATALYST SELECTED FROM THE GROUP CONSISTING OF COLBALT, NICKEL AND IRON, WHEREBY SELECTIVE REDUCTION OF THE OXIDES OF NITROGEN IS EFFECTED.
References Cited (Backward Citations)
US2381696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-13 | 1965-05-15 | 1965-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-13 | 1969-05-15 | 1969-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-13 | 1973-05-15 | 1973-11-14 | $7700.00 | Window Closed / Lapsed |