US2820799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processes for preparing lipoyl chloride
Assignee: Merck and Co Inc
•
Filing: 1955-07-11
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Granted: 1958-01-21
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Expires: 1975-07-11
Abstract
No abstract record available.
Inventors
- 👤 Arthur F Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:55
CPC Classifications
C; C07; C07D; C07D339/00; C07D339/02; C07D339/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
THE PROCESS WHICH COMPRISES REACTING AN ALKALI METAL A-LIPOATE WITH OXALYL CHLORIDE IN A SUBSTANTIALLY ANHYDROUS HYDROCARBON SOLVENT THEREBY FORMING A-LLPOYL CHLORIDE.
Claim 2
Dependent Claim
22 words
THE PROCESS WHICH COMPRISES REACTING AN ALKALI METAL A-LIPOATE WITH OXALYL CHLORIDE IN A SUBSTANTIALLY ANHYDROUS HYDROCARBON SOLVENT THEREBY FORMING A-LLPOYL CHLORIDE.
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) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |