US2535193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making hydrocarbonlead compounds
Assignee: Ethyl Corp
•
Filing: 1949-12-24
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Granted: 1950-12-26
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Expires: 1969-12-24
Abstract
No abstract record available.
Inventors
- 👤 Calingaert George
- 👤 Shapiro Hymin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:08
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
27 words
A DUAL PROCESS FOR MAKING TETRAETHYLLEAD COMPRISING TREATING A SODIUM-LEAD ALLOY WITH ETHYL CHLORIDE, AND REACTING ETHYL CHLORIDE AND ETHYLMAGNESIUM CHLORIDE WITH THE FREE LEAD SO FORMED.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |