US2574759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous process for making alkyllead compounds
Assignee: Ethyl Corp
•
Filing: 1949-01-03
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Granted: 1951-11-13
•
Expires: 1969-01-03
Abstract
No abstract record available.
Inventors
- 👤 Howard M Rodekohr
- 👤 Sidney M Blitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:42
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
THE PROCESS OF REACTING AN ACTIVE FORM OF LEAD WITH AN ALKYLATING AGENT, WHEREBY AN ALKYLLEAD AND SOLID REACTION PRODUCTS ARE FORMED, COMPRISING CONTINUOUSLY INTRODUCING THE LEAD INTO AN ASCENDING STREAM OF THE ALKYLATING AGENT, SAID ALKYLATING AGENT BEING LIQUID AT THE REACTION TEMPERATURE AND PRESSURE USED, SUSPENDING THE LEAD IN THE STREAM BY THE INITIAL VELOCITY OF THE STREAM, CLASSIFYING THE REACTION SOLIDS AND THE LEAD BY MAINTAINING A TERMINAL VELOCITY OF NOT MORE THAN THE INITIAL VELOCITY, AND SEPARATING THE ALKYLLEAD FROM THE OTHER REACTION PRODUCTS.
Claim 2
Dependent Claim
88 words
THE PROCESS OF REACTING AN ACTIVE FORM OF LEAD WITH AN ALKYLATING AGENT, WHEREBY AN ALKYLLEAD AND SOLID REACTION PRODUCTS ARE FORMED, COMPRISING CONTINUOUSLY INTRODUCING THE LEAD INTO AN ASCENDING STREAM OF THE ALKYLATING AGENT, SAID ALKYLATING AGENT BEING LIQUID AT THE REACTION TEMPERATURE AND PRESSURE USED, SUSPENDING THE LEAD IN THE STREAM BY THE INITIAL VELOCITY OF THE STREAM, CLASSIFYING THE REACTION SOLIDS AND THE LEAD BY MAINTAINING A TERMINAL VELOCITY OF NOT MORE THAN THE INITIAL VELOCITY, AND SEPARATING THE ALKYLLEAD FROM THE OTHER REACTION PRODUCTS.
References Cited (Backward Citations)
US1622228A
Cited
US1705723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |