US2724724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of concentrated solutions of alkylchlorophenoxyacetates
Assignee: Solvay SA
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Filing: 1951-12-05
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Granted: 1955-11-22
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Expires: 1971-12-05
Abstract
No abstract record available.
Inventors
- 👤 Gonze Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:43
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
86 words
A PROCESS OF PREPARING CONCENTRATED AQUEOUS SOLUTIONS OF SOLUBLE SALTS OF ALKYLCHLOROPHENOXYACETIC ACIDS SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL SALTS AND AMMONIUM SALTS WHICH COMPRISES PREPARING AN INSOLUBLE ALKALINE EARTH SALT OF THE CORRESPONDING ALKYLCHLOROPHENOXYACETIC ACIDS, SEPARATING THEREFROM ANY WATER SOLUBLE IMPURITIES, TRANSFORMING THE PURIFIED INSOLUBLE SALT INTO SAID SOLUBLE SALTS BY DOUBLE DECOMPOSITION WITH A MEMBER OF THE GROUP CONSISTING OF AMMONIUM AND ALKALI METAL HYDROXIDES AND AMMONIUM AND ALKALI METAL CARBONATES, AND SEPARATING THE RESULTING CONCENTRATED SOLUTION OF SAID ALKYLCHLOROPHENOXYACETIC ACID SALTS.
Claim 2
Dependent Claim
86 words
A PROCESS OF PREPARING CONCENTRATED AQUEOUS SOLUTIONS OF SOLUBLE SALTS OF ALKYLCHLOROPHENOXYACETIC ACIDS SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL SALTS AND AMMONIUM SALTS WHICH COMPRISES PREPARING AN INSOLUBLE ALKALINE EARTH SALT OF THE CORRESPONDING ALKYLCHLOROPHENOXYACETIC ACIDS, SEPARATING THEREFROM ANY WATER SOLUBLE IMPURITIES, TRANSFORMING THE PURIFIED INSOLUBLE SALT INTO SAID SOLUBLE SALTS BY DOUBLE DECOMPOSITION WITH A MEMBER OF THE GROUP CONSISTING OF AMMONIUM AND ALKALI METAL HYDROXIDES AND AMMONIUM AND ALKALI METAL CARBONATES, AND SEPARATING THE RESULTING CONCENTRATED SOLUTION OF SAID ALKYLCHLOROPHENOXYACETIC ACID SALTS.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |