Patent US2638474A successfully refreshed from Google Patents.
US2638474A
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Process for preparing monohydroxythiophene
Assignee: Texaco Inc
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Filing: 1948-08-27
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Granted: 1953-05-12
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Expires: 1968-08-27
Abstract
No abstract record available.
Inventors
- 👤 Kenneth L Kreuz
- 👤 Charles D Hurd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:48
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/30; C07D333/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A METHOD FOR PREPARING HYDROXYTHIOPHENE COMPOUNDS WHICH COMPRISES REACTING THIENYLMAGNESIUM HALIDE ALKYLMAGNESIUM HALIDE AND OXYGEN AND HYDROLYZING THE PRODUCT THEREBY OBTAINED.
Claim 2
Independent Claim
21 words
A METHOD FOR PREPARING HYDROXYTHIOPHENE COMPOUNDS WHICH COMPRISES REACTING THIENYLMAGNESIUM HALIDE ALKYLMAGNESIUM HALIDE AND OXYGEN AND HYDROLYZING THE PRODUCT THEREBY OBTAINED.
References Cited (Backward Citations)
US2400095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |