US2656382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 2, 4-dichlorophenoxyacetic acid
Assignee: Uniroyal Inc
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Filing: 1952-01-30
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Granted: 1953-10-20
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Expires: 1972-01-30
Abstract
No abstract record available.
Inventors
- 👤 Kulka Marshall
- 👤 John C R Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:29
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/40; C07C59/58; C07C59/64; C07C59/66; C07C59/68; C07C59/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THE PROCESS OF PREPARING 2,4-DICHLOROPHENOXYACETIC ACID WHICH COMPRISES REACTING A MIXTURE OF AN ALKALI METAL SALT OF 2,4-DICHLOROPHENOL AND AN ALKALI METAL SALT OF MONOCHLOROACETIC ACID UNDER ANHYDROUS CONDITIONS IN A MEDIUM COMPRISING A SUBSTANTIALLY WATER-INSOLUBLE INERT ORGANIC LIQUID WHICH IS A SOLVENT FOR 2,4DICHLOROPHENOL AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF HYDROCARBONS AND HALOGENATED HYDROCARBONS, THE SAID REACTION MIXTURE BEING MAINTAINED IN A FLUID STATE BY THE PRESENCE THEREIN OF FREE 2,4-DICHLOROPHENOL, WHEREBY THE SAID ALKALI METAL SALTS ARE SOLUBILIZED AND REACT RAPIDLY TO FORM THE DESIRED 2,4-DICHLOROPHENOXYACETIC ACID COMPOUND.
Claim 2
Dependent Claim
93 words
THE PROCESS OF PREPARING 2,4-DICHLOROPHENOXYACETIC ACID WHICH COMPRISES REACTING A MIXTURE OF AN ALKALI METAL SALT OF 2,4-DICHLOROPHENOL AND AN ALKALI METAL SALT OF MONOCHLOROACETIC ACID UNDER ANHYDROUS CONDITIONS IN A MEDIUM COMPRISING A SUBSTANTIALLY WATER-INSOLUBLE INERT ORGANIC LIQUID WHICH IS A SOLVENT FOR 2,4DICHLOROPHENOL AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF HYDROCARBONS AND HALOGENATED HYDROCARBONS, THE SAID REACTION MIXTURE BEING MAINTAINED IN A FLUID STATE BY THE PRESENCE THEREIN OF FREE 2,4-DICHLOROPHENOL, WHEREBY THE SAID ALKALI METAL SALTS ARE SOLUBILIZED AND REACT RAPIDLY TO FORM THE DESIRED 2,4-DICHLOROPHENOXYACETIC ACID COMPOUND.
References Cited (Backward Citations)
US2480817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |