Patent US3205381A successfully refreshed from Google Patents.
Patent US2899387A successfully refreshed from Google Patents.
US2899387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preventing corrosion during
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
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Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:31
CPC Classifications
C; C10; C10G; C10G7/00; C10G7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN THE FRACTIONAL DISTILLATION OF AN OXIDATIVELYSWEETENED, HYDROCARBON FRACTION BOILING WITHIN THE NAPHTHA BOILING RANGE AND CONTAINING ORGANIC SULFUR COMPOUNDS, INCLUDING DISULFIDES, AT AN ELEVATED TEMPERATURE NORMALLY EFFECTIVE FOR THE CONVERSION OF SAID COMPOUNDS TO PRODUCE DOCTOR-POSITIVE PRODUCTS, THE IMPROVEMENTS WHEREIN SAID CONVERSION IS MINIMIZED WHICH COMPRISES CARRYING OUT THE DISTILLATION AT SAID TEMPERATURE IN THE PRESENCE OF AN ADDED AMOUNT OF AN OIL-SOLUBLE, SATURATED ORGANIC PHOSPHITE FROM THE GROUP CONSISTING OF ALKYL AND CYCLOALKYL PHOSPHITE AND HAVING A BOILING POINT AT LEAST AS HIGH AS THE END BOILING POINT OF THE HYDROCARBON FRACTION BEING DISTILLED, THE AMOUNT OF SAID ORGANIC PHOSPHITE BEING NOT LESS THAN ABOUT 0.4% BY WEIGHT, BASED ON THE AMOUNT OF SAID HYDROCARBON FRACTION BEING FRACTIONALLY DISTILLED.
Claim 2
Dependent Claim
121 words
IN THE FRACTIONAL DISTILLATION OF AN OXIDATIVELYSWEETENED, HYDROCARBON FRACTION BOILING WITHIN THE NAPHTHA BOILING RANGE AND CONTAINING ORGANIC SULFUR COMPOUNDS, INCLUDING DISULFIDES, AT AN ELEVATED TEMPERATURE NORMALLY EFFECTIVE FOR THE CONVERSION OF SAID COMPOUNDS TO PRODUCE DOCTOR-POSITIVE PRODUCTS, THE IMPROVEMENTS WHEREIN SAID CONVERSION IS MINIMIZED WHICH COMPRISES CARRYING OUT THE DISTILLATION AT SAID TEMPERATURE IN THE PRESENCE OF AN ADDED AMOUNT OF AN OIL-SOLUBLE, SATURATED ORGANIC PHOSPHITE FROM THE GROUP CONSISTING OF ALKYL AND CYCLOALKYL PHOSPHITE AND HAVING A BOILING POINT AT LEAST AS HIGH AS THE END BOILING POINT OF THE HYDROCARBON FRACTION BEING DISTILLED, THE AMOUNT OF SAID ORGANIC PHOSPHITE BEING NOT LESS THAN ABOUT 0.4% BY WEIGHT, BASED ON THE AMOUNT OF SAID HYDROCARBON FRACTION BEING FRACTIONALLY DISTILLED.
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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |