US3072694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making tetramethyl lead
Assignee: EIDP Inc
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Filing: 1960-11-15
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Granted: 1963-01-08
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Expires: 1980-11-15
Abstract
No abstract record available.
Inventors
- 👤 Tullio Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:29
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
THE PROCESS FOR MAKING TETRAMETHYL LEAD WHICH COMPRISES MIXING AT A TEMPERATURE BELOW 40*C. A SODIUM LEAD ALLOY, AT LEAST ABOUT 0.25 MOLE PER MOLE OF SODIUM OF AN ALKYLATING AGENT WHICH CONSISTS OF A METHYL HALIDE IN WHICH THE HALOGEN HAS AN ATOMIC NUMBER IN THE RANGE OF 17 TO 53, FROM ABOUT 0.05% TO ABOUT 5% BY WEIGHT OF THE ALLOY OF AN ALUMINUM HALIDE IN WHICH THE HALOGEN HAS AN ATOMIC NUMBER IN THE RANGE OF 17 TO 53, AND FROM ABOUT 0.1 TO ABOUT 100 PARTS PER PART OF THE ALUMINUM HALIDE OF A TRIALKYL ALUMINUM IN WHICH EACH ALKYL GROUP CONTAINS 2 TO 10 CARBON ATOMS, HEATING THE MIXTURE TO A TEMPERATURE OF FROM 40* C. TO ABOUT 60* C. TO INITIATE THE METHYLATION REACTION, AND THEN HEATING THE MIXTURE TO A TEMPERATURE OF FROM 40*C. TO ABOUT 130*C. AND MAINTAINING IT AT SUCH TEMPERATURE UNTIL THE METHYLATING REACTION IS SUBSTANTIALLY COMPLETE WHILE GRADUALLY ADDING SUCH QUANTITIES OF SAID METHYL HALIDE AS MAY REQUIRED TO PROVIDE A TOTAL OF AT LEAST ONE MOLE THEREOF FOR EACH MOLE OF SODIUM.
Claim 2
Dependent Claim
184 words
THE PROCESS FOR MAKING TETRAMETHYL LEAD WHICH COMPRISES MIXING AT A TEMPERATURE BELOW 40*C. A SODIUM LEAD ALLOY, AT LEAST ABOUT 0.25 MOLE PER MOLE OF SODIUM OF AN ALKYLATING AGENT WHICH CONSISTS OF A METHYL HALIDE IN WHICH THE HALOGEN HAS AN ATOMIC NUMBER IN THE RANGE OF 17 TO 53, FROM ABOUT 0.05% TO ABOUT 5% BY WEIGHT OF THE ALLOY OF AN ALUMINUM HALIDE IN WHICH THE HALOGEN HAS AN ATOMIC NUMBER IN THE RANGE OF 17 TO 53, AND FROM ABOUT 0.1 TO ABOUT 100 PARTS PER PART OF THE ALUMINUM HALIDE OF A TRIALKYL ALUMINUM IN WHICH EACH ALKYL GROUP CONTAINS 2 TO 10 CARBON ATOMS, HEATING THE MIXTURE TO A TEMPERATURE OF FROM 40* C. TO ABOUT 60* C. TO INITIATE THE METHYLATION REACTION, AND THEN HEATING THE MIXTURE TO A TEMPERATURE OF FROM 40*C. TO ABOUT 130*C. AND MAINTAINING IT AT SUCH TEMPERATURE UNTIL THE METHYLATING REACTION IS SUBSTANTIALLY COMPLETE WHILE GRADUALLY ADDING SUCH QUANTITIES OF SAID METHYL HALIDE AS MAY REQUIRED TO PROVIDE A TOTAL OF AT LEAST ONE MOLE THEREOF FOR EACH MOLE OF SODIUM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |