Patent US2796427A successfully refreshed from Google Patents.
US2796427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing 2, 4, 5, trichlorophenoxyalkanecarboxylic acids or esters thereof
Assignee: US Philips Corp
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Filing: 1953-05-12
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Granted: 1957-06-18
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Expires: 1973-05-12
Abstract
No abstract record available.
Inventors
- 👤 Huisman Henderikus Obias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:15
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/347; C07C51/363
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A METHOD OF PRODUCING 2,4,5-TRICHLOROPHENOXYALKANE CARBOXYLIC ACIDS AND ALIPHATIC ESTERS THEREOF COMPRISING THE STEPS, DISSOLVING AN AROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF 285-DICHLOROPHENOXYALKANE CARBOXYLIC ACIDS AND ALIPHATIC ESTERS THEREOF IN AN ORGANIC POLAR SOLVENT THEREFOR, SELECTED FROM THE GROUP CONSISTING OF NITROBENZENE AND ACETIC ACID, AND INTRODUCING CHLORINE INTO SAID SOLUTION IN AN AMOUNT SUFFICIENT TO REPLACE ONE OF THE NUCLEAR HYDROGENS IN SAID AROMATIC COMPOUND WITH CHLORINE, TO FORM THEREBY THE CORRESPONDING 2,4,5-TRICHLORINATED DERIVATIVE.
Claim 2
Independent Claim
77 words
A METHOD OF PRODUCING 2,4,5-TRICHLOROPHENOXYALKANE CARBOXYLIC ACIDS AND ALIPHATIC ESTERS THEREOF COMPRISING THE STEPS, DISSOLVING AN AROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF 285-DICHLOROPHENOXYALKANE CARBOXYLIC ACIDS AND ALIPHATIC ESTERS THEREOF IN AN ORGANIC POLAR SOLVENT THEREFOR, SELECTED FROM THE GROUP CONSISTING OF NITROBENZENE AND ACETIC ACID, AND INTRODUCING CHLORINE INTO SAID SOLUTION IN AN AMOUNT SUFFICIENT TO REPLACE ONE OF THE NUCLEAR HYDROGENS IN SAID AROMATIC COMPOUND WITH CHLORINE, TO FORM THEREBY THE CORRESPONDING 2,4,5-TRICHLORINATED DERIVATIVE.
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) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |