US2881225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of grignard reagents
Assignee: Armour and Co
•
Filing: 1954-11-22
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Granted: 1959-04-07
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Expires: 1974-11-22
Abstract
No abstract record available.
Inventors
- 👤 Kaiser Emil
- 👤 Sporar Lorraine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:15
CPC Classifications
C; C07; C07F; C07F3/00; C07F3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
IN A METHOD OF PREPARING AN ARYL MAGNESIUM CHLORIDE, THE STEPS OF MIXING METALLIX MAGNESIUM AND A MINOR PORTION OF AN ARYL BROMIDE IN TETRAHYDROFURAN THUS PROVIDING A SUSPENSION THEREOF AND COMBINING SAID SUSPENSION COMPRISING METALLIC MAGNESIUM, ARYL BROMIDE AND TETRAHYDROFURAN WITH A MAJOR PORTION OF AN ARYL CHLORIDE, WHEREBY THE ARYL BROMIDE INITIATES THE REACTION OF SAID METALLIC MAGNESIUM AND SAID ARYL CHLORIDE.
Claim 2
Dependent Claim
64 words
IN A METHOD OF PREPARING AN ARYL MAGNESIUM CHLORIDE, THE STEPS OF MIXING METALLIX MAGNESIUM AND A MINOR PORTION OF AN ARYL BROMIDE IN TETRAHYDROFURAN THUS PROVIDING A SUSPENSION THEREOF AND COMBINING SAID SUSPENSION COMPRISING METALLIC MAGNESIUM, ARYL BROMIDE AND TETRAHYDROFURAN WITH A MAJOR PORTION OF AN ARYL CHLORIDE, WHEREBY THE ARYL BROMIDE INITIATES THE REACTION OF SAID METALLIC MAGNESIUM AND SAID ARYL CHLORIDE.
References Cited (Backward Citations)
US2552676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |