Patent US3804750A successfully refreshed from Google Patents.
US3804750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shale oil treatment
Assignee: Atlantic Richfield Co
•
Filing: 1972-12-22
•
Granted: 1974-04-16
•
Expires: 1992-12-22
Abstract
Abstract A METHOD FOR REMOVING ARSENIC FROM SHALE OIL BY COMTACTING THE OIL WITH A MIXTURE OF NICKEL SULFIDE AND MOLYBDENUM SULFIDE, EMPLOYING AN ELEVATED TEMPERATURE AND REDUCING ATMOSPHERE FOR SAID CONTACTING, AND TERMINATING THE CONTACTING AT LEAST BY THE TIME THAT THE EQUIVALENT OF ABOUT 7.7 WEIGHT PERCENT ARSENIC AT ONE WEIGHT HOURLY SPACE VELOCITY (WHSV) HAS BEEN DEPOSITED ON THE SULFIDE MIXTURE.
Inventors
- 👤 G Myers
- 👤 D Wunderlich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:09
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/002; C10G45/00; C10G45/02; C10G45/04; C10G45/06; C10G45/08
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) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |