Patent US2602090A successfully refreshed from Google Patents.
US2602090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the purification of phenoxy-aliphatic-monocarboxylic acids
Assignee: Dow Chemical Co
•
Filing: 1951-07-05
•
Granted: 1952-07-01
•
Expires: 1971-07-05
Abstract
No abstract record available.
Inventors
- 👤 Robert C Dosser
- 👤 Amerst E Colby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:43
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/487
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A METHOD FOR THE PURIFICATION OF A TECHNICAL PHENOXY-ALIPHATIC-MONOCARBOXYLIC ACID, WHOSE PHENYL RING MAY CONTAIN A SINGLE SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF BROMINE, CHLORINE, ALKYL AND ARYL, WHICH COMPRISES THE STEPS OF (1) CONTACTING AN AQUEOUS DISPERSION OF AN ALKALI METAL SALT OF SAID TECHNICAL ACID AT A PH OF AT LEAST 11, WITH AN ALKALI METAL HYPOCHLORITE, (2) DECOMPOSING ANY EXCESS HYPOCHLORITE IN THE MIXTURE AND (3) ACIDIFYING THE MIXTURE TO PRECIPITATE THE PURIFIED ORGANIC ACID.
Claim 2
Independent Claim
79 words
A METHOD FOR THE PURIFICATION OF A TECHNICAL PHENOXY-ALIPHATIC-MONOCARBOXYLIC ACID, WHOSE PHENYL RING MAY CONTAIN A SINGLE SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF BROMINE, CHLORINE, ALKYL AND ARYL, WHICH COMPRISES THE STEPS OF (1) CONTACTING AN AQUEOUS DISPERSION OF AN ALKALI METAL SALT OF SAID TECHNICAL ACID AT A PH OF AT LEAST 11, WITH AN ALKALI METAL HYPOCHLORITE, (2) DECOMPOSING ANY EXCESS HYPOCHLORITE IN THE MIXTURE AND (3) ACIDIFYING THE MIXTURE TO PRECIPITATE THE PURIFIED ORGANIC ACID.
References Cited (Backward Citations)
US2083856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-01 | 1955-12-31 | 1956-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-01 | 1959-12-31 | 1960-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-01 | 1963-12-31 | 1964-07-01 | $7700.00 | Window Closed / Lapsed |