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Patent US2716651A successfully refreshed from Google Patents.
US2716651A
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3-(4-chloro-7-hydroxy-3-methylphthalide-3-(5, 6, 8-trihydroxy-alpha-tetralone and method of preparing the same
Assignee: Wyeth Holdings LLC
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Filing: 1952-10-11
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Granted: 1955-08-30
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Expires: 1972-10-11
Abstract
No abstract record available.
Inventors
- 👤 Coy W Waller
- 👤 Carl F Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:14
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/87; C07D307/88
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
THE NEW COMPOUND 3-(4-CHLORO-7-HYDROXY-3-METHYLPHTHALIDE - 3) -5,6,8 - TRIHYDROXY - A - TETRALONE.
Claim 2
Dependent Claim
13 words
THE NEW COMPOUND 3-(4-CHLORO-7-HYDROXY-3-METHYLPHTHALIDE - 3) -5,6,8 - TRIHYDROXY - A - TETRALONE.
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) | 1958-08-29 | 1959-02-28 | 1959-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-29 | 1963-02-28 | 1963-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-29 | 1967-02-28 | 1967-08-30 | $7700.00 | Window Closed / Lapsed |