US3448116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 1-hydroxyhydantoins and 1-hydroxythiohydantoins
Assignee: Wyeth LLC
•
Filing: 1966-04-25
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Granted: 1969-06-03
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Expires: 1986-04-25
Abstract
No abstract record available.
Inventors
- 👤 Ronald J Mccaully
- 👤 Stanley C Bell
- 👤 Peter B Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:06
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/86; C07C; C07C275/00; C07C275/64; C07D233/72; C07D233/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2942004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |