US3630889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal nitrides as cracking catalysts
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1969-01-21
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Granted: 1971-12-28
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Expires: 1989-01-21
Abstract
Abstract A CRACKING CATALYST CONSISTS ESSENTIALLY OF A NITRIDE OF ALUMINUM, BORON, OR SILICON, SUPPORTED OR NOT, ON ALUMINA OR ALUMINA/SILICA, TITANIA, ZIRCONIA AND THE LIKE.
Inventors
- 👤 William F Arey Jr
- 👤 William J Mattox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:26
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; B; B01; B01J; B01J27/00; B01J27/24
Claims Analysis
Total Claims: 0
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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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |