US2540675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thiophene chlorination with iodine catalyst
Assignee: Velsicol Chemical LLC
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Filing: 1947-04-14
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Granted: 1951-02-06
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Expires: 1967-04-14
Abstract
No abstract record available.
Inventors
- 👤 Carl E Johnson
- 👤 Herbert C Wohlers
- 👤 George M Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:13
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
THE PROCESS WHICH INCLUDES: MIXING LIQUID THIOPHENE AND A CHLORINATING AGENT, SELECTED FROM GASEOUS CHLORINE AND SULFURYL CHLORIDE, IN THE PRESENCE OF A CATALYTIC AMOUNT OF IODINE, THE IODINE BEING PRESENT IN AN AMOUNT LESS THAN ABOUT 1 X 10-1 MOLE PER MOLE OF THIOPHENE, AND THE MOLAR RATIO OF CHLORINATING AGENT TO THIOPHENE BEING BELOW ABOUT 2.0 MOLES TO 1.
Claim 2
Dependent Claim
61 words
THE PROCESS WHICH INCLUDES: MIXING LIQUID THIOPHENE AND A CHLORINATING AGENT, SELECTED FROM GASEOUS CHLORINE AND SULFURYL CHLORIDE, IN THE PRESENCE OF A CATALYTIC AMOUNT OF IODINE, THE IODINE BEING PRESENT IN AN AMOUNT LESS THAN ABOUT 1 X 10-1 MOLE PER MOLE OF THIOPHENE, AND THE MOLAR RATIO OF CHLORINATING AGENT TO THIOPHENE BEING BELOW ABOUT 2.0 MOLES TO 1.
References Cited (Backward Citations)
US1946040A
Cited
US2504084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |