Patent US2622093A successfully refreshed from Google Patents.
US2622093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of tetraalkyllead compounds
Assignee: Ethyl Corp
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Filing: 1951-05-23
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Granted: 1952-12-16
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Expires: 1971-05-23
Abstract
No abstract record available.
Inventors
- 👤 Sidney M Blitzer
- 👤 Orland M Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:20
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
PROCESS FOR THE RECOVERY OF A TETRAALKYLLEAD FROM A DRY REACTION MASS HAVING THEREIN APPRECIABLE TETRAALKYLLEAD NOT DISCRENIBLE AS A SEPARATE PHASE, COMPRISING INTIMATELY CONTACTING THE REACTION MASS WITH WATER FOR A SUFFICIENT TIME TO SUBSTITUTE THE WATER FOR THE TETRAALKYLLEAD AND FORM A SEPARATE LIQUID PHASE OF THE TETRAALKYLLEAD, AND WITHDRAWING THE SO-FORMED LIQUID TETRAALKYLLEAD.
Claim 2
Dependent Claim
56 words
PROCESS FOR THE RECOVERY OF A TETRAALKYLLEAD FROM A DRY REACTION MASS HAVING THEREIN APPRECIABLE TETRAALKYLLEAD NOT DISCRENIBLE AS A SEPARATE PHASE, COMPRISING INTIMATELY CONTACTING THE REACTION MASS WITH WATER FOR A SUFFICIENT TIME TO SUBSTITUTE THE WATER FOR THE TETRAALKYLLEAD AND FORM A SEPARATE LIQUID PHASE OF THE TETRAALKYLLEAD, AND WITHDRAWING THE SO-FORMED LIQUID TETRAALKYLLEAD.
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) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |