US2690418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asphalt production
Assignee: Standard Oil Development Co
•
Filing: 1952-04-01
•
Granted: 1954-09-28
•
Expires: 1972-04-01
Abstract
No abstract record available.
Inventors
- 👤 David W Young
- 👤 Henry J Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:54
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/02; C10C3/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS FOR UNGRADING A RESIDUAL OIL TO AN ASPHALT CHARACTERIZED BY A MELTING POINT ABOVE ABOUT 180* F., AND A DUCTILITY ABOVE ABOUT 25, COMPRISING REACTING LESS THAN 5% OF CARBON TETRACHLORIDE WITH THE RESIDUAL OIL AT A TEMPERATURE IN THE RANGE OF ABOUT 350* TO 600* F., SAID REACTION BEING CONDUCTED WHILE REMOVING HYDROGEN CHLORIDE EVOLVED IN THE COURSE OF THE REACTION.
Claim 2
Dependent Claim
64 words
A PROCESS FOR UNGRADING A RESIDUAL OIL TO AN ASPHALT CHARACTERIZED BY A MELTING POINT ABOVE ABOUT 180* F., AND A DUCTILITY ABOVE ABOUT 25, COMPRISING REACTING LESS THAN 5% OF CARBON TETRACHLORIDE WITH THE RESIDUAL OIL AT A TEMPERATURE IN THE RANGE OF ABOUT 350* TO 600* F., SAID REACTION BEING CONDUCTED WHILE REMOVING HYDROGEN CHLORIDE EVOLVED IN THE COURSE OF THE REACTION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |