US4123262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental gold alloy
Assignee: J F JELENKO & Co 99 BUSINESS PARK DRIVE ARMONK NEW YORK 10504
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Filing: 1977-07-06
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Granted: 1978-10-31
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Expires: 1997-07-06
Abstract
Abstract A silverless gold alloy consists of about 50-58% gold, 0.5-10.5% indium, 0.5-8.5% tin or 1.0-3.0% gallium, and the balance palladium. This alloy has physical properties similar to ADA Spec. No. 5 for Type IV dental casting gold alloys; and it may have porcelain fused thereto for making dental prosthetic appliances, with little chance that the porcelain will be stained.
Inventors
- 👤 Paul J. Cascone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:01
CPC Classifications
C; C22; C22C; C22C5/00; C22C5/02; A; A61; A61K; A61K6/00; A61K6/80; A61K6/84; A61K6/844
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
55 words
A dental gold alloy consisting, in percent by weight, of about: 50 to 58% gold, 0.5 to 10.5% indium, 0.5 to 8.5% tin or 1.0 to 3.0% gallium, and the balance palladium; said alloy being non-staining and bondable to porcelain, castable without difficulty below 2500° F., and having at least 10% elongation in one inch.
Claim 2
Dependent Claim
55 words
A dental gold alloy consisting, in percent by weight, of about: 50 to 58% gold, 0.5 to 10.5% indium, 0.5 to 8.5% tin or 1.0 to 3.0% gallium, and the balance palladium; said alloy being non-staining and bondable to porcelain, castable without difficulty below 2500° F., and having at least 10% elongation in one inch.
Claim 3
Dependent Claim
25 words
An alloy in accordance with claim 1 containing approximately: 50 to 53% gold, 4 to 6% indium, 4 to 6% tin, and the balance palladium.
Claim 4
Dependent Claim
17 words
An alloy in accordance with claim 2 wherein the total of indium and tin is about 10%.
Claim 5
Dependent Claim
25 words
An alloy in accordance with claim 1 containing, approximately: 53 to 58% gold; 6 to 10.5% indium; 0.5 to 4% tin; and the balance palladium.
Claim 6
Dependent Claim
25 words
An alloy in accordance with claim 1 containing, approximately: 50 to 54% gold; 6 to 9.5% indium; 1 to 3% gallium; and the balance palladium.
Claim 7
Dependent Claim
18 words
An alloy in accordance with claim 5 consisting of 51.5% gold; 8.5% indium; 1.5% gallium; and 38.5% palladium.
Claim 8
Dependent Claim
11 words
A dental appliance comprised of the cast alloy of claim 1.
Claim 9
Dependent Claim
15 words
A dental appliance according to claim 7 having porcelain bonded to a surface portion thereof.
Claim 10
Dependent Claim
88 words
A dental gold alloy consisting, in percent by weight, of about: 50 to 58% gold, 0.5 to 10.5% indium, 0 to 8.5% tin, 0 to 3% gallium, and the balance palladium; when gallium is absent at least 0.5% tin is present, when tin is absent at least 1% gallium is present; and when gallium and tin are both absent about 10.5% indium is present; said alloy being non-staining and bondable to porcelain and having a liquidus temperature below 2500° F. and at least 10% elongation in one inch.
Claim 11
Dependent Claim
88 words
A dental gold alloy consisting, in percent by weight, of about: 50 to 58% gold, 0.5 to 10.5% indium, 0 to 8.5% tin, 0 to 3% gallium, and the balance palladium; when gallium is absent at least 0.5% tin is present, when tin is absent at least 1% gallium is present; and when gallium and tin are both absent about 10.5% indium is present; said alloy being non-staining and bondable to porcelain and having a liquidus temperature below 2500° F. and at least 10% elongation in one inch.
Claim 12
Dependent Claim
21 words
An alloy in accordance with claim 9 wherein the total of indium and tin is about 10%, and gallium is absent.
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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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |