US2717907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 2, 4, 5-trichlorophenoxy acetic acid
Assignee: FMC Corp
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Filing: 1952-11-12
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Granted: 1955-09-13
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Expires: 1972-11-12
Abstract
No abstract record available.
Inventors
- 👤 Edward F Orwoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:13
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
61 words
THE METHOD OF PRODUCING 2,4,5-TRICHLOROPHENOXY ACETIC ACID FROM 2,5-DICHLOROPHENOL WHICH COMPRISES FIRST HEATING 2,5-DICHLOROPHENOL AND MONOCHLORACETIC ACID IN THE PRESENCE OF CAUSTIC ALKALI TO PRODUCE THE SODIUM SALT OF 2,5-DICHLOROPHENOXY ACETIC ACID, AND REACTING A MOLAR QUANTITY OF THE LATTER WITH A MOLAR QUANTITY OF CHLORINE BY PASSING THE CALCULATED QUANTITY OF CHLORINE GAS THROUGH AN AQUEOUS SUSPENSION OF SAID SALT.
Claim 2
Independent Claim
61 words
THE METHOD OF PRODUCING 2,4,5-TRICHLOROPHENOXY ACETIC ACID FROM 2,5-DICHLOROPHENOL WHICH COMPRISES FIRST HEATING 2,5-DICHLOROPHENOL AND MONOCHLORACETIC ACID IN THE PRESENCE OF CAUSTIC ALKALI TO PRODUCE THE SODIUM SALT OF 2,5-DICHLOROPHENOXY ACETIC ACID, AND REACTING A MOLAR QUANTITY OF THE LATTER WITH A MOLAR QUANTITY OF CHLORINE BY PASSING THE CALCULATED QUANTITY OF CHLORINE GAS THROUGH AN AQUEOUS SUSPENSION OF SAID SALT.
References Cited (Backward Citations)
US2471575A
Cited
US2598692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-12 | 1959-03-14 | 1959-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-12 | 1963-03-14 | 1963-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-12 | 1967-03-14 | 1967-09-13 | $7700.00 | Window Closed / Lapsed |