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Patent US4385892A successfully refreshed from Google Patents.
US4385892A
Expired / Lapsed
US
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Setting compositions for dental purposes
Assignee: ATSUSHIGE SATO
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Filing: 1982-03-09
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Granted: 1983-05-31
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Expires: 2002-03-09
Abstract
Abstract A novel setting composition for dental purposes comprises a dental silver amalgam alloy composed mainly of silver and tin, and including one or more of copper, zinc, indium, palladium and gold; mercury in an amount sufficient to amalgamate said alloy: and selenium. The selenium may or may not be coated with a metal showing an affinity for mercury, such as silver. The amount of selenium contained is in a range of 0.005 to 5% by weight.
Inventors
- 👤 Atsushige Sato
- 👤 Ishi Miura
- 👤 Yasuhiro Kumei
- 👤 Osamu Okuno
- 👤 Bunsaku Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:42
CPC Classifications
C; C22; C22C; C22C5/00; C22C5/06; A; A61; A61K; A61K6/00; A61K6/80; A61K6/84; A61K6/847
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
40 words
A setting composition for dental purposes comprising a dental silver alloy composed mainly of silver and tin, and including one or more of copper, zinc, indium, palladium and gold; mercury in an amount sufficient to amalgamate said alloy; and selenium.
Claim 2
Dependent Claim
40 words
A setting composition for dental purposes comprising a dental silver alloy composed mainly of silver and tin, and including one or more of copper, zinc, indium, palladium and gold; mercury in an amount sufficient to amalgamate said alloy; and selenium.
Claim 3
Dependent Claim
19 words
A setting composition of claim 1, in which selenium is coated with one or more of said alloy ingredients.
Claim 4
Dependent Claim
25 words
A setting composition of claim 1 or 2, in which the amount of selenium contained is in a range of 0.005 and 5% by weight.
Claim 5
Dependent Claim
12 words
A setting composition of claim 1, in which said alloy contains selenium.
Claim 6
Dependent Claim
24 words
A setting composition of claim 1 or 4, in which said alloy contains mercury in an amount of no more than 3% by weight.
Claim 7
Dependent Claim
21 words
A setting composition of claim 1, 2 or 4, in which selenium is contained in the mercury to amalgamate said alloy.
Claim 8
Dependent Claim
23 words
A setting composition of claim 1, 2 or 4, in which selenium is present in both said alloy and said mercury for amalgamation.
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) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |