Patent US4541982A successfully refreshed from Google Patents.
US3754019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
5-arylphenylphosphonic and phosphonous acids
Assignee: Merck and Co Inc
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Filing: 1970-04-20
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Granted: 1973-08-21
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Expires: 1990-04-20
Abstract
Abstract 5-ARYLPHENYLPHOSPHONIC AND PHOSPHONOUS ACIDS AND THEIR DERIVATIVES ARE DESCRIBED AND THE PROCESSES FOR PREPARING THE SAME ARE DISCLOSED. THESE COMPOUNDS EXHIBIT ANTI-INFLAMMATORY PROPERTIES AND ALSO POSSESSES AN EFFECTIVE DEGREE OF ANTI-PYRETIC AND ANALGESIC ACTIVITY.
Inventors
- 👤 L Sarett
- 👤 J Hannah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:09
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/44; C07F9/4403; C07F9/4419; C07C; C07C205/00; C07C205/13; C07C205/26; C07F9/3804; C07F9/3834; C07F9/48
Claims Analysis
Total Claims: 0
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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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |