US3043672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted catechol antioxidants
Assignee: Ethyl Corp
•
Filing: 1956-08-22
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Granted: 1962-07-10
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Expires: 1976-08-22
Abstract
No abstract record available.
Inventors
- 👤 George G Ecke
- 👤 Alfred J Kolka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:13
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C07; C07C; C07C37/00; C07C37/11; C07C37/18; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C09; C09K; C09K15/00; C09K15/04; C09K15/06; C09K15/08; C10L1/18; C10L1/182; C10L1/183; C10L1/20; C10L1/201; C10L1/30; C10L1/305; C10L1/306
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
GASOLINE NORMALLY TENDING TO DETERIORATE IN AIR CONTAINING ABOUT THREE MILLILITERS OF TETRAETHYLLEAD PER GALLON OF FUEL, FROM ABOUT 0.01 TO ABOUT 2 PERCENT BY WEIGHT OF 3,5-DI-ALKYL CATECHOL HAVING ALKYL GROUPS CONTAINING FROM 4-1/ CARBON ATOMS CHARACTERIZED IN THAT SAID ALKYL GROUP CONTAIN A BRANCH CHAIN ON THE CARBON ATOM IMMEDIATELY ADJACENT THE PHENOLIC NUCLEUS, AND A SCAVENGING AMOUNT OF AN ETHYLENE DIHALIDE.
References Cited (Backward Citations)
US1945521A
Cited
US2116220A
Cited
US2181102A
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US2264896A
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US2304466A
Cited
US2455746A
Cited
US2439421A
Cited
US2610983A
Cited
US2829175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |