Patent US4592890A successfully refreshed from Google Patents.
US4592890A
Expired / Lapsed
US
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Dental prostheses alloy
Assignee: Dentsply Research and Development Corp
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Filing: 1983-08-08
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Granted: 1986-06-03
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Expires: 2003-08-08
Abstract
Abstract Disclosed is an alloy that is a combination by weight percent of 78 to 84 percent nickel, 11 to 15 percent chromium, 3 to 5 percent vanadium, and 1 to 2 percent beryllium. Any balance of other elements make up less than 7 percent with aluminum, manganese, silicon, tin, lanthanum, cerium, praseodymium, neodymium, samarium, gadolinium, molybdenum, niobium, tantalum, tungsten, titanium, iron, boron, and carbon specifically disclosed. The alloy is, in particular, a dental casting alloy or dental veneering alloy, and dental prostheses containing the alloy is a feature of the disclosure.
Inventors
- 👤 Arthur P. Burnett
- 👤 Wayne C. Bollinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:32
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058; A; A61; A61K; A61K6/00; A61K6/80; A61K6/84; A61K6/842
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
38 words
An alloy composition consisting essentially of in weight percent about 78 to about 84 percent nickel, about 11 to about 15 percent chromium, about 3 to about 5 percent vanadium, and about 1 to about 2 percent beryllium.
Claim 2
Dependent Claim
38 words
An alloy composition consisting essentially of in weight percent about 78 to about 84 percent nickel, about 11 to about 15 percent chromium, about 3 to about 5 percent vanadium, and about 1 to about 2 percent beryllium.
Claim 3
Dependent Claim
102 words
The alloy of claim 1 wherein said alloy consisting essentially of additional elements in weight percent 0 to about 3 percent of an element chosen from the group consisting of aluminum, manganese, silicon, tin, and the rare earths: lanthanum, cerium, praseodymium, neodymium, samarium, and gadolinium; 0 to about 7 percent molybdenum, niobium, tantalum, tungsten and titanium; 0 to about 2 percent iron; 0 to about 1 percent boron; and 0 to about 0.8 percent carbon; each named additional element present individually or in combination with another named additional element within the ranges specified and with incidental impurities not exceeding about 7 percent.
Claim 4
Dependent Claim
43 words
The alloy of claim 1 wherein said alloy consisting essentially of in weight percent about 78 to about 83 percent nickel, about 12 to about 15 percent chromium, and 3.5 to about 4.5 percent vanadium, and about 1.65 to about 1.95 percent beryllium.
Claim 5
Dependent Claim
56 words
The alloy of claim 2 wherein said alloy consisting essentially of in weight percent about 78 to about 83 percent nickel, about 12 to about 15 percent chromium, about 3.5 to about 4.5 percent vanadium, and about 1.65 to about 1.95 percent beryllium with the additional elements and impurities being not more than about 5 percent.
Claim 6
Dependent Claim
42 words
A dental prostheses comprising an alloy consisting essentially of in weight percent of about 78 to about 84 percent nickel, about 11 to about 15 percent chromium, about 3 to about 5 percent vanadium, and about 1 to about 2 percent beryllium.
Claim 7
Dependent Claim
42 words
A dental prostheses comprising an alloy consisting essentially of in weight percent of about 78 to about 84 percent nickel, about 11 to about 15 percent chromium, about 3 to about 5 percent vanadium, and about 1 to about 2 percent beryllium.
Claim 8
Dependent Claim
33 words
The dental prostheses of claim 5 wherein said alloy is at least in part formed into the shape of a tooth and coated with a procelain facing which permanently adheres to said alloy.
Claim 9
Dependent Claim
45 words
The dental prostheses of claim 6 wherein said alloy consisting essentially of in weight percent about 78 percent to about 83 percent nickel, about 12 to about 15 percent chromium, about 3.5 to about 4.5 percent vanadium, and about 1.65 to about 1.95 percent beryllium.
Claim 10
Dependent Claim
103 words
The dental prostheses of claim 7 wherein said alloy consisting essentially of additional elements in weight percent 0 to about 3 percent of an element chosen from the group consisting of aluminum, manganese, silicon, tin, and the rare earths lanthanum, cerium, praseodymium, neodymium, samarium and gadolinium; 0 to about 7 percent molybdenum, niobium, tantalum, tungsten and titanium; 0 to about 2 percent iron; 0 to about 1 percent boron; and 0 to about 0.8 percent carbon; each named additional element present individually or in combination with another named additional element within the ranges specified and with incidental impurities not exceeding about 5 percent.
Claim 11
Dependent Claim
49 words
An alloy particularly suitable for use in making dental prostheses and the like consisting essentially of in weight percent of about 78 to about 84 percent nickel, about 11 to about 15 percent chromium, about 3 to about 5 percent vanadium, and about 1 to about 2 percent beryllium.
Claim 12
Dependent Claim
49 words
An alloy particularly suitable for use in making dental prostheses and the like consisting essentially of in weight percent of about 78 to about 84 percent nickel, about 11 to about 15 percent chromium, about 3 to about 5 percent vanadium, and about 1 to about 2 percent beryllium.
Claim 13
Dependent Claim
141 words
The alloy of claim 9 as a dental casting alloy wherein said alloy consisting essentially in weight percent of: about 78 to about 84 percent nickel, about 11 to about 15 percent chromium, about 3 to about 5 percent vanadium, and about 1 to about 2 percent beryllium, any balance being essentially additional elements 0 to about 3 percent of an element chosen from the group consisting of aluminum, manganese, silicon, tin, and the rare earths: lanthanum, cerium, praseodymium, neodymium, samarium and gadolinium; 0 to about 7 percent molybdenum, niobium, tantalum, tunsten, and titanium; 0 to about 2 percent iron; 0 to about 1 percent boron; and 0 to about 0.8 percent carbon; each named additional element present individually or in combination with any other named additional element within the ranges specified and with incidental impurities not exceeding about 7 percent.
Claim 14
Dependent Claim
57 words
The dental casting alloy of claim 10 wherein said alloy consisting essentially of in weight percent about 78 to 83 percent nickel, about 12 to about 15 percent chromium, about 3.5 to about 4.5 percent vanadium, and about 1.65 to about 1.95 percent beryllium with the additional elements and impurities being not more than about 5 percent.
Claim 15
Dependent Claim
107 words
The alloy of claim 9 as a dental veneering alloy wherein said alloy consisting essentially of additional elements in weight percent 0 to about 3 percent of an element chosen from the group consisting of aluminum, manganese, silicon, tin, and the rare earths: lanthanum, cerium, praseodymium, neodymium, samarium, and gadolinium; 0 to about 7 percent molybdenum, niobium, tantalum, tungsten and titanium; 0 to about 2 percent iron; 0 to about 1 percent boron; and 0 to about 0.8 percent carbon; each named additional element present individually or in combination with another named additional element within the ranges specified and with incidental impurities not exceeding about 7 percent.
Claim 16
Dependent Claim
48 words
The alloy of claim 9 as a dental veneering alloy wherein said alloy consisting essentially of in weight percent about 78 to about 83 percent nickel, about 12 to about 15 percent chromium, about 3.5 to about 4.5 percent vanadium, and about 1.65 to about 1.95 percent beryllium.
Claim 17
Dependent Claim
61 words
The alloy of claim 12 as a dental veneering alloy wherein said alloy consisting essentially of in weight percent about 78 to about 83 percent nickel, about 12 to about 15 percent chromium, about 3.5 to about 4.5 percent vanadium, and about 1.65 to about 1.95 percent beryllium with the additional elements and impurities being not more than about 5 percent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-02 | 1989-12-02 | 1990-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-02 | 1993-12-02 | 1994-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-02 | 1997-12-02 | 1998-06-03 | $7700.00 | Window Closed / Lapsed |