US3552913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of decomposing nitrogen oxides
Assignee: Ethyl Corp
•
Filing: 1969-07-22
•
Granted: 1971-01-05
•
Expires: 1989-07-22
Abstract
Abstract A METHOD OF DECOMPOSING NITROGEN OXIDE IS PROVIDED BY CONTACTING AN OXIDE OF NITROGEN-CONTAINING GAS WITH A SUITABLE CATALYST, SAID CATALYST CONSISTING OF 0.001 TO 25 WEIGHT PERCENT OF NEODYMIUM IN AN OXIDE FORM, USUALLY WITH A CATALYST SUPPORT.
Inventors
- 👤 Ruth E Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:45
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9404; B01D53/9409; B01D53/9413; B01J; B01J23/00; B01J23/10; B01D2255/00; B01D2255/20; B01D2255/206; B01D2255/2068
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |