Patent US2700637A successfully refreshed from Google Patents.
US2700637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the removal of asphaltic constituents from residual oils
Assignee: Standard Oil Development Co
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Filing: 1951-11-30
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Granted: 1955-01-25
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Expires: 1971-11-30
Abstract
No abstract record available.
Inventors
- 👤 Jr William T Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:28
CPC Classifications
C; C10; C10G; C10G55/00; C10G55/02; C10G55/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A PROCESS FOR DEASPHALTING A RESIDUAL OIL DERIVED FROM A CRUDE OIL AND BOILING ABOVE ABOUT 860* F., THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID RESIDUAL OIL WITH A C2 TO C5 HYDROCARBON DEASPHALTING SOLVENT AND WITH A CYCLE OIL BOILING ABOVE ABOUT 850* F. COMPRISING THE BOTTOMS PRODUCT OF THE CATALYTIC CRACKING OF A GAS OIL AND CONTAINING HIGH BOILING AROMATIC COMPOUNDS WHEREBY A RESIDUAL OIL OF IMPROVED CRACKING CHARACTERISTICS IS OBTAINED.
Claim 2
Dependent Claim
73 words
IN A PROCESS FOR DEASPHALTING A RESIDUAL OIL DERIVED FROM A CRUDE OIL AND BOILING ABOVE ABOUT 860* F., THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID RESIDUAL OIL WITH A C2 TO C5 HYDROCARBON DEASPHALTING SOLVENT AND WITH A CYCLE OIL BOILING ABOVE ABOUT 850* F. COMPRISING THE BOTTOMS PRODUCT OF THE CATALYTIC CRACKING OF A GAS OIL AND CONTAINING HIGH BOILING AROMATIC COMPOUNDS WHEREBY A RESIDUAL OIL OF IMPROVED CRACKING CHARACTERISTICS IS OBTAINED.
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) | 1958-01-24 | 1958-07-26 | 1959-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-24 | 1962-07-26 | 1963-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-24 | 1966-07-26 | 1967-01-25 | $7700.00 | Window Closed / Lapsed |