Patent US3007858A successfully refreshed from Google Patents.
US3007858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of organo metallic compounds
Assignee: ChampionX LLC
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Filing: 1959-05-06
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Granted: 1961-11-07
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Expires: 1979-05-06
Abstract
No abstract record available.
Inventors
- 👤 David G Braithwaite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:55
CPC Classifications
C; C25; C25B; C25B3/00; C25B3/01; C25B3/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A PROCESS FOR PREPARING ALKYL LEAD COMPOUNDS WHICH COMPRISES ELECTROLYZING, USING A LEAD ANODE, A SUBSTANTIALLY ANHYDROUS SOLUTION OF A GRIGNARD REAGENT IN A SUBSTANTIALLY INERT ORGANIC SOLVENT FOR SAID GRIGNARD REAGENT EMPLOYING AN ELECTROLYZING CURRENT EFFECTIVE TO CAUSE SAID LEAD ANODE TO DISSOLVE IN SAID SOLUTION OF SAID GRIGNARD REAGENT IN SAID ORGANIC SOLVENT, ADDING AN EXCESS OF AN ALKYL HALIDE OVER THAT REQUIRED FOR THE FORMATION OF THE GRIGNARD REAGENT, AND RECOVERING FROM THE RESULTANT PRODUCT AN ALKYL LEAD COMPOUND CONSISTING OF ALKYL RADICALS LINKED DIRECTLY TO METALLIC LEAD.
Claim 2
Dependent Claim
91 words
A PROCESS FOR PREPARING ALKYL LEAD COMPOUNDS WHICH COMPRISES ELECTROLYZING, USING A LEAD ANODE, A SUBSTANTIALLY ANHYDROUS SOLUTION OF A GRIGNARD REAGENT IN A SUBSTANTIALLY INERT ORGANIC SOLVENT FOR SAID GRIGNARD REAGENT EMPLOYING AN ELECTROLYZING CURRENT EFFECTIVE TO CAUSE SAID LEAD ANODE TO DISSOLVE IN SAID SOLUTION OF SAID GRIGNARD REAGENT IN SAID ORGANIC SOLVENT, ADDING AN EXCESS OF AN ALKYL HALIDE OVER THAT REQUIRED FOR THE FORMATION OF THE GRIGNARD REAGENT, AND RECOVERING FROM THE RESULTANT PRODUCT AN ALKYL LEAD COMPOUND CONSISTING OF ALKYL RADICALS LINKED DIRECTLY TO METALLIC LEAD.
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) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |