Patent US4160592A successfully refreshed from Google Patents.
Patent US2435998A successfully refreshed from Google Patents.
Patent US2557019A successfully refreshed from Google Patents.
US2557019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor fuel and antiknock agent
Assignee: Standard Oil Development Co
•
Filing: 1949-05-31
•
Granted: 1951-06-12
•
Expires: 1969-05-31
Abstract
No abstract record available.
Inventors
- 👤 William E Morris
- 👤 Jr William C Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:00
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/20; C10L1/201; C10L1/202; C10L1/24; C10L1/2431; C10L1/2443; C10L1/245; C10L1/30; C10L1/305; C10L1/306
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
AN IMPROVED MOTOR FUEL WHICH COMPRISES HYDROCARBONS BOILING IN THE MOTOR FUEL BOILING RANGE, AN ADDED ALKYL LEAD ANTIKNOCK COMPOUND, A SCAVENGING AGENT AND A SULFUR COMPOUND BOILING IN THE RANGE FROM ABOUT 340* F. TO 390* F. AND WHICH IS SELECTED FROM THE CLASS OF ALKYL THIOPHENES.
Claim 2
Dependent Claim
48 words
AN IMPROVED MOTOR FUEL WHICH COMPRISES HYDROCARBONS BOILING IN THE MOTOR FUEL BOILING RANGE, AN ADDED ALKYL LEAD ANTIKNOCK COMPOUND, A SCAVENGING AGENT AND A SULFUR COMPOUND BOILING IN THE RANGE FROM ABOUT 340* F. TO 390* F. AND WHICH IS SELECTED FROM THE CLASS OF ALKYL THIOPHENES.
References Cited (Backward Citations)
US2452489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |