Patent US2720448A successfully refreshed from Google Patents.
US2720448A
Expired / Lapsed
US
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Motor fuels
Assignee: EIDP Inc
•
Filing: 1952-10-27
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Granted: 1955-10-11
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Expires: 1972-10-27
Abstract
No abstract record available.
Inventors
- 👤 Fred S Arimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:29
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/30; C10L1/301; C10L1/303
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A HYDROCARBON MOTOR FUEL FOR SPARK IGNITION ENGINES CONTAINING, FOR EACH GALLON THEREOF, FROM ABOUT 0.5 TO ABOUT 5 ML. OF TETRAETHYL LEAD, AND FROM 0.1 TO ABOUT 3 ML. OF A BORINATE ESTER OF THE FORMULA R2BOR WHICH CONTAINS 9 TO 18 CARBON ATOMS AND WHEREIN EACH R IS HYDROCARBON RADICAL OF 1 TO 7 CARBON ATOMS AND AT LEAST ONE R IS AN ALKYL RADICAL.
Claim 2
Dependent Claim
67 words
A HYDROCARBON MOTOR FUEL FOR SPARK IGNITION ENGINES CONTAINING, FOR EACH GALLON THEREOF, FROM ABOUT 0.5 TO ABOUT 5 ML. OF TETRAETHYL LEAD, AND FROM 0.1 TO ABOUT 3 ML. OF A BORINATE ESTER OF THE FORMULA R2BOR WHICH CONTAINS 9 TO 18 CARBON ATOMS AND WHEREIN EACH R IS HYDROCARBON RADICAL OF 1 TO 7 CARBON ATOMS AND AT LEAST ONE R IS AN ALKYL RADICAL.
References Cited (Backward Citations)
US2151432A
Cited
US2257194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |