Patent US2562994A successfully refreshed from Google Patents.
US2562994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing
Assignee: —
•
Filing: —
•
Granted: 1951-08-07
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Expires: 1968-08-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:24
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A METHOD FOR PREPARING FLUOROTHIOPHENES WHICH COMPRISES REACTING IODOTHIOPHENES WITH AN TIMONY TRIFLUORIDE IN THE LIQUID PHASE IN THE PRESENCE OF NITROMETHANE AS A SOLVENT.
Claim 2
Independent Claim
25 words
A METHOD FOR PREPARING FLUOROTHIOPHENES WHICH COMPRISES REACTING IODOTHIOPHENES WITH AN TIMONY TRIFLUORIDE IN THE LIQUID PHASE IN THE PRESENCE OF NITROMETHANE AS A SOLVENT.
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) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |