US2698231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental amalgam
Assignee: Bayer AG
•
Filing: 1951-05-15
•
Granted: 1954-12-28
•
Expires: 1971-05-15
Abstract
No abstract record available.
Inventors
- 👤 Schulze Ernst
- 👤 Nehse Albrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:28
CPC Classifications
C; C22; C22C; C22C7/00; A; A61; A61K; A61K6/00; A61K6/80; A61K6/84; A61K6/847
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) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |