US2935390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel additives
Assignee: Ethyl Corp
•
Filing: 1954-01-29
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Granted: 1960-05-03
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Expires: 1974-01-29
Abstract
No abstract record available.
Inventors
- 👤 John D Bartleson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:23
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/04; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/26; C10L1/2691
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
AN ANTIKNOCK FLUID CONSISTING ESSENTIALLY OF TETRAETHYLLEAD, A SCAVENGING AGENT FOR TETRAETHYLLEAD, SAID SCAVENGING AGENT BEING SELECTED FROM THE GROUP CONSISTING OF ETHYLENE DICHLORIDE, ETHYLENE DIBROMIDE AND MIXTURES THEREOF, AND A REACTION PRODUCT OF (A) A PHOSPHROUS SULFIDE SELECTED FROM THE GROUP CONSISTING OF P2S5 AND P4S7, (B) AN OLEFINIC HYDROCARBON POLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 100 TO ABOUT 500, (C) AN AMINE CONTAINING ABOUT 5 TO ABOUT 36 CARBON ATOMS AND HAVING A DISSOCIATION CONSTANT CHARACTERISTIC OF A BASE OF NOT LESS THAN ABOUT 1X10**-9, SAID PRODUCT BEING IN SAID COMPOSITION IN AMOUNT SUCH THAT THE PHOSPHORUS: LEAD ATOM RATIO IS FROM ABOUT 0.2:3 TO ABOUT 0.7:3, AND SAID AMINE BEING PRESENT IN SAID REACTION PRODUCT IN AMOUNT SUCH THAT THE WEIGHT RATIO OF NITROGEN TO PHOSPHORUS IS FROM ABOUT 0.0129 TO ABOUT 0.129 BASED ON THE PHOSPHORUS CONTAINED IN SAID PRODUCT.
Claim 2
Dependent Claim
34 words
THE COMPOSITION OF CLAIM 2 FURTHER CHARACTERIZED IN THAT SAID POLYMER USED TO FORM SAID PRODUCT IS OBTAINED BY THE POLYMERIZATION OF PROPYLENES AND BUTYLENES AND HAS AN AVERAGE MOLECULAR WEIGHT OF ABOUT 140.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |