US3391176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chelate compounds and process for their preparation
Assignee: Beecham Research Laboratories Ltd
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Filing: 1967-02-16
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Granted: 1968-07-02
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Expires: 1987-02-16
Abstract
No abstract record available.
Inventors
- 👤 Grossmith Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:34
CPC Classifications
A; A61; A61K; A61K31/00; C; C07; C07C; C07C65/00; C07C65/01; C07C65/03; C07C65/05; C07C65/10; C07F; C07F3/00; C07F3/003; C07F5/00; C07F5/06; C07F5/069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |