Patent US2660596A successfully refreshed from Google Patents.
US2660596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable lead alkyl compositions and a method for preparing the same
Assignee: Ethyl Corp
•
Filing: 1952-03-24
•
Granted: 1953-11-24
•
Expires: 1972-03-24
Abstract
No abstract record available.
Inventors
- 👤 Calingaert George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:37
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN THE PROCESS OF PRODUCING TETRAETHYLLEAD BY REACTING A SODIUM-LEAD ALLOY WITH ETHYL CHLORIDE AND SEPARATING THE THUS PRODUCED TETRAETHYLLEAD FROM THE REACTION MASS BY STEAM DISTILLATION, THE STEP WHICH COMPRISES CONDUCTING SAID STEAM DISTILLATION IN THE PRESENCE OF A THERMAL STABILIZER SELECTED FROM THE CLASS CONSISTING OF FUSED RING HYDROCARBONS, HALOGEN-CONTAINING FUSED RING HYDROCARBONS, ARYL-SUBSTITUTED OLEFINS, AND HALOGEN-CONTAINING ARYL-SUBSTITUTED OLEFINS.
Claim 2
Dependent Claim
61 words
IN THE PROCESS OF PRODUCING TETRAETHYLLEAD BY REACTING A SODIUM-LEAD ALLOY WITH ETHYL CHLORIDE AND SEPARATING THE THUS PRODUCED TETRAETHYLLEAD FROM THE REACTION MASS BY STEAM DISTILLATION, THE STEP WHICH COMPRISES CONDUCTING SAID STEAM DISTILLATION IN THE PRESENCE OF A THERMAL STABILIZER SELECTED FROM THE CLASS CONSISTING OF FUSED RING HYDROCARBONS, HALOGEN-CONTAINING FUSED RING HYDROCARBONS, ARYL-SUBSTITUTED OLEFINS, AND HALOGEN-CONTAINING ARYL-SUBSTITUTED OLEFINS.
References Cited (Backward Citations)
US1843942A
Cited
US2303820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |