Patent US2819293A successfully refreshed from Google Patents.
US2819293A
Expired / Lapsed
US
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Process for the preparation of chlorinecontaining derivatives of benzene carboxylic acids
Assignee: N V Koninklijke Pharmaceutische Farbrieken V/h Brocades-Stheeman & Pharmacia
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Filing: 1955-06-27
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Granted: 1958-01-07
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Expires: 1975-06-27
Abstract
No abstract record available.
Inventors
- 👤 Stelt Cornelis Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:44
CPC Classifications
A; A01; A01N; A01N37/00; A01N37/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
PROCESS FOR THE PREPARATION OF CHLORINE-CONTAINING COMPOUNDS WHICH COMPRISES INTRODUCING CHLORINE GAS INTO A MIXTURE OF AN ALKYL ESTER OF THE GROUP CONSISTING OF 2HYDROXY, 4-HYDROXY, 2-AMINO, 4-AMINO, 2,4-DIHYDROXY, 2,4-DIAMINO, 2-HYDROXY-4-AMINO AND 2-AMINO-J-HYDROXY BENZENE CARBOXYLIC ACIDS AND THEIR 3,5-DICHLORO DERIVATIVES IN AN ORGANIC MEDIUM AT SUCH A RATE THAT THE MIXTURE DOES NOT BOIL AND UNTIL THE EVOLUTION OF HYDROGEN CHLORIDE CEASES AND SEPARATING THE REACTION PRODUCT CONTAINING FROM 6 TO 10 CHLORINE ATOMS FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
78 words
PROCESS FOR THE PREPARATION OF CHLORINE-CONTAINING COMPOUNDS WHICH COMPRISES INTRODUCING CHLORINE GAS INTO A MIXTURE OF AN ALKYL ESTER OF THE GROUP CONSISTING OF 2HYDROXY, 4-HYDROXY, 2-AMINO, 4-AMINO, 2,4-DIHYDROXY, 2,4-DIAMINO, 2-HYDROXY-4-AMINO AND 2-AMINO-J-HYDROXY BENZENE CARBOXYLIC ACIDS AND THEIR 3,5-DICHLORO DERIVATIVES IN AN ORGANIC MEDIUM AT SUCH A RATE THAT THE MIXTURE DOES NOT BOIL AND UNTIL THE EVOLUTION OF HYDROGEN CHLORIDE CEASES AND SEPARATING THE REACTION PRODUCT CONTAINING FROM 6 TO 10 CHLORINE ATOMS FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |