Patent US2575275A successfully refreshed from Google Patents.
US2575275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety fuel for automobile type marine engines
Assignee: Standard Oil Development Co
•
Filing: 1949-04-15
•
Granted: 1951-11-13
•
Expires: 1969-04-15
Abstract
No abstract record available.
Inventors
- 👤 Jr William C Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:02
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; C10L1/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
59 words
A SAFETY FUEL COMPOSITION CHARACTERIZED BY RESEARCH MINUS MOTOR OCTANE NUMBER APPRECIATIONS OF 4 TO 12 CONSISTING ESSENTIALLY OF BLENDS OF TETRAHYDRONAPHTHALENE AND ALKYLATE FRACTIONS BOILING IN THE RANGE OF ABOUT 300* F. TO 450* F. AND A KNOCK SUPPRESSING CONCENTRATION OF A LEAD ANTI-KNOCK AGENT SAID COMPOSITION CONTAINING ABOUT 15 TO 50 VOLUME PERCENT OF THE SAID TETRAHYDRONAPHTHALENE.
References Cited (Backward Citations)
GB500066A
Cited
US2356647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |