US3049558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of tetramethyllead
Assignee: Ethyl Corp
•
Filing: 1959-04-29
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Granted: 1962-08-14
•
Expires: 1979-04-29
Abstract
No abstract record available.
Inventors
- 👤 Shirl E Cook
- 👤 Thomas O Sistrunk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:28
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/24; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/16; C10L1/1608; C10L1/20; C10L1/201; C10L1/30; C10L1/305; C10L1/306
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN THE PRESENCE OF CATALYTICALLY ALKYLATING A SODIUMLEAD ALLOY WITH METHYL CHLORIDE, THE IMPROVEMENT ACCORDING TO WHICH METHYL CHLORIDE IS THE ONLY ALKLATING AGENT USED, THE ALKYLATION IS CARRIED OUT IN A LIQUID HYDROCARBON HAVING AN ATMOSPHERIC BOILING POINT OF FROM ABOUT 90 TO 150*C., AND BEING IN PROPORTIONS OF FROM AT LEAST ABOUT 5 PARTS TO 25 PARTS BY WEIGHT PER 100 PARTS OF LEAD IN THE ALLOY CHARGED, AND LESS THAN 50 VOLUME PERCENT OF THE METHYL CHLORIDE, THE METHYL CHLORIDE BEING FED IN PROPORTIONS OF FROM ABOUT 5 PERCENT EXCESS PLUS SUFFICIENT METHYL CHLORIDE TO OCCUPY AS VAPOR THE FREE SPACE OF THE REACTION SYSTEM, TO ABOUT 330 PERCENT EXCESS, THE MEAN REACTION TEMPERATURE BEING FROM ABOUT 70 TO 130*C., THE REACTION PRESSURE BEING THE AUTOGENOUS PRESSURE OF THE REACTANTS AND THE REACTION TIME BEING NOT MORE THAN ABOUT SEVEN HOURS.
Claim 2
Dependent Claim
144 words
IN THE PRESENCE OF CATALYTICALLY ALKYLATING A SODIUMLEAD ALLOY WITH METHYL CHLORIDE, THE IMPROVEMENT ACCORDING TO WHICH METHYL CHLORIDE IS THE ONLY ALKLATING AGENT USED, THE ALKYLATION IS CARRIED OUT IN A LIQUID HYDROCARBON HAVING AN ATMOSPHERIC BOILING POINT OF FROM ABOUT 90 TO 150*C., AND BEING IN PROPORTIONS OF FROM AT LEAST ABOUT 5 PARTS TO 25 PARTS BY WEIGHT PER 100 PARTS OF LEAD IN THE ALLOY CHARGED, AND LESS THAN 50 VOLUME PERCENT OF THE METHYL CHLORIDE, THE METHYL CHLORIDE BEING FED IN PROPORTIONS OF FROM ABOUT 5 PERCENT EXCESS PLUS SUFFICIENT METHYL CHLORIDE TO OCCUPY AS VAPOR THE FREE SPACE OF THE REACTION SYSTEM, TO ABOUT 330 PERCENT EXCESS, THE MEAN REACTION TEMPERATURE BEING FROM ABOUT 70 TO 130*C., THE REACTION PRESSURE BEING THE AUTOGENOUS PRESSURE OF THE REACTANTS AND THE REACTION TIME BEING NOT MORE THAN ABOUT SEVEN HOURS.
References Cited (Backward Citations)
US1749567A
Cited
US2270109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |