Patent US3554738A successfully refreshed from Google Patents.
US3554738A
Expired / Lapsed
US
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Dental amalgam
Assignee: RICHARD F HARVEY
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Filing: 1968-05-21
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Granted: 1971-01-12
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Expires: 1988-05-21
Abstract
Abstract AN IMPROVED DENTAL AMALGAM CONTAINING ONE TO TEN PERCENT BY WEIGHT OF GALLIUM FOR ADHESION OF THE AMALGAM TO THE TOOTH SURFACES.
Inventors
- 👤 Victor E Beldham
- 👤 Richard F Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:52
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)
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |