US2575323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of organolead compounds
Assignee: Ethyl Corp
•
Filing: 1950-12-09
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Granted: 1951-11-20
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Expires: 1970-12-09
Abstract
No abstract record available.
Inventors
- 👤 Shapiro Hymin
- 👤 Witt Earl G De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:46
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR MAKING TETRA-SUBSTITUTED ORGANOLEAD COMPOUNDS COMPRISING REACTING LEAD WITH AN AGENT SELECTED FROM THE CLASS CONSISTING OF ALKYLATING AND ARYLATING AGENTS IN THE PRESENCE OF AN ALKALI METAL-POLYCYLIC AROMATIC HYDROCARBON COMPLEX, SAID AGENT HAVING THE HYDROCARBON RADICALS IN QUESTION AND HAVING A NEGATIVE RADICAL WHICH REACTS WITH THE ALKALI METAL IN SAID ALKALI METAL COMPLEX.
Claim 2
Dependent Claim
57 words
A PROCESS FOR MAKING TETRA-SUBSTITUTED ORGANOLEAD COMPOUNDS COMPRISING REACTING LEAD WITH AN AGENT SELECTED FROM THE CLASS CONSISTING OF ALKYLATING AND ARYLATING AGENTS IN THE PRESENCE OF AN ALKALI METAL-POLYCYLIC AROMATIC HYDROCARBON COMPLEX, SAID AGENT HAVING THE HYDROCARBON RADICALS IN QUESTION AND HAVING A NEGATIVE RADICAL WHICH REACTS WITH THE ALKALI METAL IN SAID ALKALI METAL COMPLEX.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |