US2585091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Side chain halogenation of alkyl thiophenes
Assignee: Texaco Inc
•
Filing: 1947-11-14
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Granted: 1952-02-12
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Expires: 1967-11-14
Abstract
No abstract record available.
Inventors
- 👤 John T Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:18
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
IN THE HALOGENATION OF ALKYL THIOPHENE COMPOUNDS, THE METHOD OF PREFERENTIALLY EFFECTING SUBSTITUTION OF THE SIDE CHAIN WHICH COMPRISES REACTING AN ALKYL THIOPHENE COMPOUND WITH HALOGEN AT A TEMPERATURE BETWEEN ABOUT 450 AND 750* F. AND AT A SPACE VELOCITY OF AT LEAST 50 VOLUMES OF ALKYL THIOPHENE PER HOUR PER VOLUME OF REACTOR SPACE.
Claim 2
Dependent Claim
55 words
IN THE HALOGENATION OF ALKYL THIOPHENE COMPOUNDS, THE METHOD OF PREFERENTIALLY EFFECTING SUBSTITUTION OF THE SIDE CHAIN WHICH COMPRISES REACTING AN ALKYL THIOPHENE COMPOUND WITH HALOGEN AT A TEMPERATURE BETWEEN ABOUT 450 AND 750* F. AND AT A SPACE VELOCITY OF AT LEAST 50 VOLUMES OF ALKYL THIOPHENE PER HOUR PER VOLUME OF REACTOR SPACE.
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) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |