US2991176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making dental amalgams and product thereof
Assignee: L D CAULK Co
•
Filing: 1959-04-15
•
Granted: 1961-07-04
•
Expires: 1979-04-15
Abstract
No abstract record available.
Inventors
- 👤 John J Clancy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:58
CPC Classifications
C; C22; C22C; C22C7/00; A; A61; A61K; A61K6/00; A61K6/80; A61K6/84; A61K6/847; C22C1/00; C22C1/10; C22C1/1084; C23; C23C; C23C24/00; C23C24/02; C23C24/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
124 words
AN AMALGAM MATERIAL ADAPTED TO BE USED IN FILING A TOOTH COMPRISING A PLURALITY OF COATED PARTICLES, SAID PARTICLES HAVING AN INERT CORE OF MATERIAL UNREACTIVE WITH MERCURY, SAID MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF COPPER, NICKEL, ALUMINA, ALUNDUM, AND SILICA, EACH OF SAID PARTICLES HAVING A COATING OF DENTAL ALLOY THEREON, EACH OF SAID CORES BEING FROM ABOUT 10 MICRONS TO ABOUT 180 MICRONS IN SIZE, MERCURY IS ADMIXTURE WITH SAID COATED PARTICLES, A MERCURY BOND BETWEEN THE COATINGS OF EACH OF SAID PARTICLES AND SAID MERCURY, SAID BOND BEING SEPARATE FROM AND UNREACTED WITH SAID INERT CORE, SAID ALLOY HAVING BEEN PERMANENTLY ADHERED TO THE SURFACE OF EACH OF SAID PARTICLES BY COMMON BALL-MILLING OF SAID ALLOY AND SAID CORES.
References Cited (Backward Citations)
US485280A
Cited
US2723204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |