US3160998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Restoration of catalyst by surface grinding
Assignee: ExxonMobil Oil Corp
•
Filing: 1962-02-08
•
Granted: 1964-12-15
•
Expires: 1982-02-08
Abstract
No abstract record available.
Inventors
- 👤 John W Payne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:44
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/20; B01J38/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
31 words
THE METHOD OF REMOVING METAL CONTAMINATES FROM THE SURFACE OF A GRANULAR PARTICLE OF CATALYST WHICH COMPRISES PASSING AN AERATED BED OF METAL CONTAMINATED GRANULAR CATALYST PARTICLES THROUGH A HORIZONTAL ABRADING
References Cited (Backward Citations)
US1647249A
Cited
US1930383A
Cited
US2421212A
Cited
US2651600A
Cited
US2892771A
Cited
US2826011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-15 | 1968-06-15 | 1968-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-15 | 1972-06-15 | 1972-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-15 | 1976-06-15 | 1976-12-15 | $7700.00 | Window Closed / Lapsed |