Patent US2834786A successfully refreshed from Google Patents.
US2834786A
Expired / Lapsed
US
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Process for preparing nicotinic acid
Assignee: Honeywell International Inc
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Filing: 1955-09-01
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Granted: 1958-05-13
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Expires: 1975-09-01
Abstract
No abstract record available.
Inventors
- 👤 Max B Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:00
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/79; C07D213/803
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
A PROCESS FOR CONVERTING THE DIAMMONIUM SALT OF ISOCINCHOMERONIC ACID TO AMMONIUM NICOTINATE, WHICH COMPRISES SUBJECTING A NON-ACIDIC AQUEOUS SOLUTION OF SAID DIAMMONIUM SALT OF ISOCINCHOMERONIC ACID TO TEMPERATURES BETWEEN ABOUT 225*C. AND ABOUT 325*C. UNDER PRESSURES RANGING FROM ABOUT 500 P. S. I. G. TO ABOUT 1500 P. S. I. G. FOR A TIME BETWEEN ABOUT 2 MINUTES AND ABOUT 2 HOURS, CORRELATED WITH TEMPERATURE, WHEREBY SUBSTANTIAL DECARBOXYLATION OF THE ALPBA CARBOXYLATE GROUP IS EFFECTED WITHOUT SUBSTANTIAL DECARBOXYLATION OF THE BETA CARBOXYLATE GROUP.
Claim 2
Dependent Claim
84 words
A PROCESS FOR CONVERTING THE DIAMMONIUM SALT OF ISOCINCHOMERONIC ACID TO AMMONIUM NICOTINATE, WHICH COMPRISES SUBJECTING A NON-ACIDIC AQUEOUS SOLUTION OF SAID DIAMMONIUM SALT OF ISOCINCHOMERONIC ACID TO TEMPERATURES BETWEEN ABOUT 225*C. AND ABOUT 325*C. UNDER PRESSURES RANGING FROM ABOUT 500 P. S. I. G. TO ABOUT 1500 P. S. I. G. FOR A TIME BETWEEN ABOUT 2 MINUTES AND ABOUT 2 HOURS, CORRELATED WITH TEMPERATURE, WHEREBY SUBSTANTIAL DECARBOXYLATION OF THE ALPBA CARBOXYLATE GROUP IS EFFECTED WITHOUT SUBSTANTIAL DECARBOXYLATION OF THE BETA CARBOXYLATE GROUP.
Claim 3
Dependent Claim
79 words
A CONTINUOUS PROCESS FOR THE PREPARATION OF AMMONIUM NICOTINATE WHICH COMPRISES CONTINUOUSLY PASSING AN AQUEOUS SOLUTION OF DIAMMONIUM ISOCINCHOMERONATE THROUGH A CONFINED REACTION ZONE MAINTAINED AT A TEMPERATURE IN THE RANGE BETWEEN ABOUT 225*C. AND ABOUT 325*C. AND UNDER PRESSURE RANGING FROM ABOUT 500 P. S. I. G. TO ABOUT 1500 P. S. I. G. DURING A RESIDENCE, TIME CORRELATED WITH TEMPERATURE OF BETWEEN ABOUT 2 MINUTES AND ABOUT 2 HOURS, WHEREBY DIAMMONIUM ISOCINNCHOMERONATE IS CONVERTED TO AMMONIUM NICOTINATE.
Claim 4
Dependent Claim
79 words
A CONTINUOUS PROCESS FOR THE PREPARATION OF AMMONIUM NICOTINATE WHICH COMPRISES CONTINUOUSLY PASSING AN AQUEOUS SOLUTION OF DIAMMONIUM ISOCINCHOMERONATE THROUGH A CONFINED REACTION ZONE MAINTAINED AT A TEMPERATURE IN THE RANGE BETWEEN ABOUT 225*C. AND ABOUT 325*C. AND UNDER PRESSURE RANGING FROM ABOUT 500 P. S. I. G. TO ABOUT 1500 P. S. I. G. DURING A RESIDENCE, TIME CORRELATED WITH TEMPERATURE OF BETWEEN ABOUT 2 MINUTES AND ABOUT 2 HOURS, WHEREBY DIAMMONIUM ISOCINNCHOMERONATE IS CONVERTED TO AMMONIUM NICOTINATE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |