Patent US2758956A successfully refreshed from Google Patents.
US2758956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of hydrocarbons with phosphoric acid amides
Assignee: Houdry Process Corp
•
Filing: 1952-10-31
•
Granted: 1956-08-14
•
Expires: 1972-10-31
Abstract
No abstract record available.
Inventors
- 👤 Shalit Harold
- 👤 Sol W Weller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:49
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
THE METHOD WHICH COMPRISES THE STEP OF CONTACTING A HYDROCARBON OIL MIXTURE CONSISTING ONLY OF NORMALLY LIQUID HYDROCARBONS IN LIQUID STATE WITH A LIQUID CHARACTERIZED BY A PHOSPHORIC ACID AMIDE TO EFFECT SELECTIVE REMOVAL OF MORE POLAR SUBSTANCES FROM SAID LIQUID HYDROCARBON OIL MIXTURE, SAID PHOSPHORIC ACID AMINDE BEING ONE CORRESPONDING TO THE GENERAL FORMULA:
Claim 2
Independent Claim
55 words
THE METHOD WHICH COMPRISES THE STEP OF CONTACTING A HYDROCARBON OIL MIXTURE CONSISTING ONLY OF NORMALLY LIQUID HYDROCARBONS IN LIQUID STATE WITH A LIQUID CHARACTERIZED BY A PHOSPHORIC ACID AMIDE TO EFFECT SELECTIVE REMOVAL OF MORE POLAR SUBSTANCES FROM SAID LIQUID HYDROCARBON OIL MIXTURE, SAID PHOSPHORIC ACID AMINDE BEING ONE CORRESPONDING TO THE GENERAL FORMULA:
References Cited (Backward Citations)
US2166140A
Cited
US2183852A
Cited
US2225910A
Cited
US2385981A
Cited
US2623611A
Cited
US2502966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |