US2970099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylated asphalt composition containing lubricating oil and alkylated asphaltenes
Assignee: Shell USA Inc
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Filing: 1958-06-26
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Granted: 1961-01-31
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Expires: 1978-06-26
Abstract
No abstract record available.
Inventors
- 👤 John C Illman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:50
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/005; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
AS A NEW COMPOSITION OF MATTER AN ASPHALT COMPRISING 5 TO 50% BY WEIGHT OF AN ASPHALTENE FRACTION HAVING A CARBON-TO-HYDROGEN ATOMIC RATIO BETWEEN ABOUT 0.72 AND ABOUT 0.84, SAID ASPHALTENE BEING ALKYLATED WITH 1-20 ALKYL RADICALS PER MOLECULE, EACH ALKYL RADICAL HAVING 16-40 CARBON ATOMS AND 95-50% BY WEIGHT OF NONASPHALENIC PETROLEUM COMPONENTS HAVING A BOILING RANGE AT LEAST AS HIGH AS PETROLEUM LUBRICATING OIL.
Claim 2
Dependent Claim
66 words
AS A NEW COMPOSITION OF MATTER AN ASPHALT COMPRISING 5 TO 50% BY WEIGHT OF AN ASPHALTENE FRACTION HAVING A CARBON-TO-HYDROGEN ATOMIC RATIO BETWEEN ABOUT 0.72 AND ABOUT 0.84, SAID ASPHALTENE BEING ALKYLATED WITH 1-20 ALKYL RADICALS PER MOLECULE, EACH ALKYL RADICAL HAVING 16-40 CARBON ATOMS AND 95-50% BY WEIGHT OF NONASPHALENIC PETROLEUM COMPONENTS HAVING A BOILING RANGE AT LEAST AS HIGH AS PETROLEUM LUBRICATING OIL.
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) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |