US2935513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous production of 2-methyl-5-ethylpyridine
Assignee: Takeda Pharmaceutical Co Ltd
•
Filing: 1957-09-10
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Granted: 1960-05-03
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Expires: 1977-09-10
Abstract
No abstract record available.
Inventors
- 👤 Takeba Kanji
- 👤 Terada Tanoshi
- 👤 Sato Tadao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:25
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/08; C07D213/09; C07D213/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR CONTINUOUSLY PREPARING 2-METHYL-5ETHYLPYRIDINE WHICH COMPRISES CONTINUOUSLY PASSING A MIXTURE OF PARALDHYDE AND AQUEOUS AMMONIA AND CONTAINING A CATALYST SELECTED FROM THE GROUP CONSISTING OF MOLYBDIC SAID, TUNGSTIC ACID AND SALTS OF SAID ACIDS UPWARDLY THROUGH A VERTICALLY ELONGATED REACTION ZONE MAINTAINED AT A TEMPERATURE IN THE RANGE OF 190* TO 250*C. AND AT A PRESSURE SUFFICIENT TO MAINTAIN THE REACTION MIXTURE IN LIQUID PHASE, AND AT THE SAME TIME IMPARTING A PULSATION TO THE REACTION MIXTURE IN THE REACTION ZONE TO PROMOTE EMULSIFICATION OF THE REACTION MIXTURE.
Claim 2
Dependent Claim
90 words
A PROCESS FOR CONTINUOUSLY PREPARING 2-METHYL-5ETHYLPYRIDINE WHICH COMPRISES CONTINUOUSLY PASSING A MIXTURE OF PARALDHYDE AND AQUEOUS AMMONIA AND CONTAINING A CATALYST SELECTED FROM THE GROUP CONSISTING OF MOLYBDIC SAID, TUNGSTIC ACID AND SALTS OF SAID ACIDS UPWARDLY THROUGH A VERTICALLY ELONGATED REACTION ZONE MAINTAINED AT A TEMPERATURE IN THE RANGE OF 190* TO 250*C. AND AT A PRESSURE SUFFICIENT TO MAINTAIN THE REACTION MIXTURE IN LIQUID PHASE, AND AT THE SAME TIME IMPARTING A PULSATION TO THE REACTION MIXTURE IN THE REACTION ZONE TO PROMOTE EMULSIFICATION OF THE REACTION MIXTURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |