US2644827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of tetraethyllead
Assignee: Ethyl Corp
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Filing: 1951-08-31
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Granted: 1953-07-07
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Expires: 1971-08-31
Abstract
No abstract record available.
Inventors
- 👤 Clarence M Neher
- 👤 Frank L Padgitt
- 👤 Paul E Weimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:01
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
THE CONTINUOUS PROCESS OF MAKING TETRAETHYLLEAD COMPRISING FEEDING AN ALKALI METAL ALLOY OF LEAD AND A LIQUID ETHYLATING AGENT TO AN ETHYLATION ZONE, IN THE PROPORTIONS OF AT LEAST 2 PARTS BY WEIGHT OF ETHLATING AGENT TO 1 PARTY BY WEIGHT OF ALLOY, AND ETHYLATING THEREIN, AGITATING THE ETHYLATION MIXTURE ONLY SUFFICIENTLY TO MAINTAIN THE REACTING AND REACTED SOLIDS IN NON-UNIFORM DISTRIBUTION IN A LIQUID COMPRISING A SOLUTION OF TETRAETHYLLEAD IN THE ETHYLATING AGENT, SAID LIQUID BEING OF UNIFORM COMPOSITION THROUGHOUT THE ETHYLATION ZONE, AND WITHDRAWING AT A POINT REMOTE FROM THE BOTTOM OF THE ETHYLATION ZONE A SLURRY OF SOLIDS IN THE LIQUID, SAID SOLIDS BEING MORE ETHYLATED THAN THE SOLIDS IN THE ETHYLATION ZONE.
Claim 2
Dependent Claim
116 words
THE CONTINUOUS PROCESS OF MAKING TETRAETHYLLEAD COMPRISING FEEDING AN ALKALI METAL ALLOY OF LEAD AND A LIQUID ETHYLATING AGENT TO AN ETHYLATION ZONE, IN THE PROPORTIONS OF AT LEAST 2 PARTS BY WEIGHT OF ETHLATING AGENT TO 1 PARTY BY WEIGHT OF ALLOY, AND ETHYLATING THEREIN, AGITATING THE ETHYLATION MIXTURE ONLY SUFFICIENTLY TO MAINTAIN THE REACTING AND REACTED SOLIDS IN NON-UNIFORM DISTRIBUTION IN A LIQUID COMPRISING A SOLUTION OF TETRAETHYLLEAD IN THE ETHYLATING AGENT, SAID LIQUID BEING OF UNIFORM COMPOSITION THROUGHOUT THE ETHYLATION ZONE, AND WITHDRAWING AT A POINT REMOTE FROM THE BOTTOM OF THE ETHYLATION ZONE A SLURRY OF SOLIDS IN THE LIQUID, SAID SOLIDS BEING MORE ETHYLATED THAN THE SOLIDS IN THE ETHYLATION ZONE.
References Cited (Backward Citations)
US2091114A
Cited
FR963005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |