US2688628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of alkyllead compounds
Assignee: Ethyl Corp
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Filing: 1951-11-27
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Granted: 1954-09-07
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Expires: 1971-11-27
Abstract
No abstract record available.
Inventors
- 👤 Shapiro Hymin
- 👤 Ivar T Krohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:34
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
61 words
A PROCESS FOR THE MANUFACTURE OF ALKYLLEAD COMPOUNDS COMPRISING TREATING A SODIUM LEAD ALLOY CONTAINING BETWEEN ABOUT 20 AND 22 WEIGHT PERCENT SODIUM WITH AN UNDILUTED ALKYLATING AGENT SELECTED FROM THE CLASS CONSISTING OF ALKYL SULFATES AND ALKYL PHOSPHATES AT A TEMPERATURE OF ABOUT 110* TO 150* C. AND IN THE PRESENCE OF A THERMAL STABILIZER FOR THE ALKYLLEAD COMPOUND PRODUCED.
References Cited (Backward Citations)
US1611695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-06 | 1958-03-08 | 1958-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-06 | 1962-03-08 | 1962-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-06 | 1966-03-08 | 1966-09-07 | $7700.00 | Window Closed / Lapsed |