US3284345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for desulfurization of crude oil or heavy oil
Assignee: Yawata Iron and Steel Co Ltd
•
Filing: 1964-06-26
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Granted: 1966-11-08
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Expires: 1984-06-26
Abstract
No abstract record available.
Inventors
- 👤 Ishiko Toshimasa
- 👤 Tamura Takaaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:31
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/02; C10G29/04; C10G45/00; C10G45/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN A PROCESS FOR REMOVING THE SULFUR FROM CRUDE OIL BY INTIMATELY ADMIXING A DESULFURIZING AGENT AND SAID CRUDE OIL AND PRECIPITATING AND SEPARATING THE SULFUR FROM SAID CRUDE OIL, THE IMPROVEMENT WHEREIN CRUDE OIL AND THE DESULFURIZING AGENT ARE ADMIXED AND AGITATED AT ROOM TEMPERATURE AND THE DESULFURIZING AGENT IS POWDERED PYROPHORIC IRON PRODUCED BY REDUCING LATERITIC IRON ORE CONTAINING A LARGE QUANTITY OF ALUMINA AT A TEMPERATURE OF 500* TO 800*C. AT A REDUCTION RATE OF ABOUT 50 TO 80% IN A REDUCING GAS ATMOSPHERE CONTAINING 50 TO 80%% HYDROGEN.
Claim 2
Dependent Claim
92 words
IN A PROCESS FOR REMOVING THE SULFUR FROM CRUDE OIL BY INTIMATELY ADMIXING A DESULFURIZING AGENT AND SAID CRUDE OIL AND PRECIPITATING AND SEPARATING THE SULFUR FROM SAID CRUDE OIL, THE IMPROVEMENT WHEREIN CRUDE OIL AND THE DESULFURIZING AGENT ARE ADMIXED AND AGITATED AT ROOM TEMPERATURE AND THE DESULFURIZING AGENT IS POWDERED PYROPHORIC IRON PRODUCED BY REDUCING LATERITIC IRON ORE CONTAINING A LARGE QUANTITY OF ALUMINA AT A TEMPERATURE OF 500* TO 800*C. AT A REDUCTION RATE OF ABOUT 50 TO 80% IN A REDUCING GAS ATMOSPHERE CONTAINING 50 TO 80%% HYDROGEN.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |