US2963423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of catalytic cracking feed stocks
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1958-12-31
•
Granted: 1960-12-06
•
Expires: 1978-12-31
Abstract
No abstract record available.
Inventors
- 👤 Birchfield George Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:28
CPC Classifications
C; C10; C10G; C10G7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
IN A DISTILLATION PROCESS WHEREIN A METALS CONTAMINATED PETROLEUM HYDROCARBON FEED STOCK CONTAINING A SUBSTANTIAL PORTION OF HYDROCARBON CONSTITUENTS BOILING ABOVE 900*F. IS CHARGED TO A DISTALLATION ZONE AND FRACTIONATED THEREIN TO SEGREGATE A GAS OIL FRACTION, THE IMPROVEMENT WHICH COMPRISES MAINTAINING A FRACTIONATION ZONE WITHIN SAID DISTILLATION ZONE, FURTHER MAINTAINING A METALLIC SCREENING ZONE SUPERIMPOSED ABOVE SAID FRACTIONATION
Claim 2
Dependent Claim
59 words
IN A DISTILLATION PROCESS WHEREIN A METALS CONTAMINATED PETROLEUM HYDROCARBON FEED STOCK CONTAINING A SUBSTANTIAL PORTION OF HYDROCARBON CONSTITUENTS BOILING ABOVE 900*F. IS CHARGED TO A DISTALLATION ZONE AND FRACTIONATED THEREIN TO SEGREGATE A GAS OIL FRACTION, THE IMPROVEMENT WHICH COMPRISES MAINTAINING A FRACTIONATION ZONE WITHIN SAID DISTILLATION ZONE, FURTHER MAINTAINING A METALLIC SCREENING ZONE SUPERIMPOSED ABOVE SAID FRACTIONATION
References Cited (Backward Citations)
US2777802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |