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US2563725A
Expired / Lapsed
US
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Phenolsulfonamides
Assignee: Wyeth Holdings LLC
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Filing: 1949-05-10
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Granted: 1951-08-07
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Expires: 1969-05-10
Abstract
No abstract record available.
Inventors
- 👤 Martin E Hultquist
- 👤 Jr William B Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:54
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/38; C07D277/50; C07D277/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
THE METHOD OF MANUFACTURING COMPOUNDS OF THE GENERAL FORMULA
Claim 2
Independent Claim
9 words
THE METHOD OF MANUFACTURING COMPOUNDS OF THE GENERAL FORMULA
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 |