Patent US2657207A successfully refreshed from Google Patents.
US2657207A
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Preparation of isocinchomeronic acid
Assignee: EIDP Inc
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Filing: 1951-02-27
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Granted: 1953-10-27
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Expires: 1971-02-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry Henderson Herring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:38
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/79; C07D213/803
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR THE PREPARATION OF METAL SALTS OF ISOCINCHOMERONIC ACID, WHICH COMPRISES HEATING AT A TEMPERATURE ABOVE 140* C. AND UNDER SUPERATMOSPHERIC PRESSURE A 2,5-DIALKYLPYRIDINE, NITRIC, ACID OF A CONCENTRATION BETWEEN 10 AND 60%, AND A COMPOUND CAPABLE OF YIELDING IN THE REACTION MEDIUM IONS OF A BIVALNET METAL TAKEN FROM THE GROUP CONSISTING OF COPPER, ZINC, AND NICKE, AND COMPOUND BEING PRESENT IN AN AMOUNT GREATER THAN THAT NECESSARY TO PROVIDE 0.5 GRAM ATOM OF METAL FOR EACH MOLE OF 2,5-DIALKYLPYRIDINE, THEREBY FORMING METAL DIISOCINCHOMERONATE.
Claim 2
Dependent Claim
87 words
A PROCESS FOR THE PREPARATION OF METAL SALTS OF ISOCINCHOMERONIC ACID, WHICH COMPRISES HEATING AT A TEMPERATURE ABOVE 140* C. AND UNDER SUPERATMOSPHERIC PRESSURE A 2,5-DIALKYLPYRIDINE, NITRIC, ACID OF A CONCENTRATION BETWEEN 10 AND 60%, AND A COMPOUND CAPABLE OF YIELDING IN THE REACTION MEDIUM IONS OF A BIVALNET METAL TAKEN FROM THE GROUP CONSISTING OF COPPER, ZINC, AND NICKE, AND COMPOUND BEING PRESENT IN AN AMOUNT GREATER THAN THAT NECESSARY TO PROVIDE 0.5 GRAM ATOM OF METAL FOR EACH MOLE OF 2,5-DIALKYLPYRIDINE, THEREBY FORMING METAL DIISOCINCHOMERONATE.
References Cited (Backward Citations)
US2524957A
Cited
US2371691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |