Patent US2728648A successfully refreshed from Google Patents.
US2728648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiknock fluids
Assignee: Ethyl Corp
•
Filing: 1952-07-26
•
Granted: 1955-12-27
•
Expires: 1972-07-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Daniel A Hirschler
- 👤 Irish Glenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:38
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/22; C10L1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
AN ANTIKNOCK COMPOSITION CONSISTING ESSENTIALLY OF A LEAD ALKYL ANTIKNOCK AGENT AND A GASOLINE SOLUBLE ORGANIC LITHIUM COMPOUND WHICH IS FREE FROM LITHIUM-TOCARBON BONDS, SAID COMPOUND BEING FURTHER CHARACTERIZED BY (A) HAVING A LINKING ELEMENT BETWEEN LITHIUM AND CARBON, SAID ELEMENT BEING SELECTED FROM THE GROUP CONSISTING OF OXYGEN, NITROGEN AND SULFUR, AND (B) CONTAINING ONLY ELEMENTS SELECTED FROM THE GROUP CONSISTING OF LITHIUM, CARBON, HYDROGEN, OXYGEN, SULFUR AND NITROGEN; AND ORGANIC LITHIUM COMPOUND BEING PRESENT IN AMOUNT SUCH THAT THE LITHIUM-TO-LEAD ATOM RATIO IS BETWEEN ABOUT 0.001 TO 1 AND ABOUT 10.0 TO 1.
Claim 2
Dependent Claim
95 words
AN ANTIKNOCK COMPOSITION CONSISTING ESSENTIALLY OF A LEAD ALKYL ANTIKNOCK AGENT AND A GASOLINE SOLUBLE ORGANIC LITHIUM COMPOUND WHICH IS FREE FROM LITHIUM-TOCARBON BONDS, SAID COMPOUND BEING FURTHER CHARACTERIZED BY (A) HAVING A LINKING ELEMENT BETWEEN LITHIUM AND CARBON, SAID ELEMENT BEING SELECTED FROM THE GROUP CONSISTING OF OXYGEN, NITROGEN AND SULFUR, AND (B) CONTAINING ONLY ELEMENTS SELECTED FROM THE GROUP CONSISTING OF LITHIUM, CARBON, HYDROGEN, OXYGEN, SULFUR AND NITROGEN; AND ORGANIC LITHIUM COMPOUND BEING PRESENT IN AMOUNT SUCH THAT THE LITHIUM-TO-LEAD ATOM RATIO IS BETWEEN ABOUT 0.001 TO 1 AND ABOUT 10.0 TO 1.
References Cited (Backward Citations)
US1991127A
Cited
US2378793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |