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US5227131A Expired / Lapsed US ⏱️ 0.0 years remaining

Metal alloy for cast prosthetic frames in dentistry

Assignee: EDELSTAHL WITTEN-KREFELD GmbH
•
Filing: 1991-09-11
•
Granted: 1993-07-13
•
Expires: 2011-09-11
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Abstract

Abstract A metal alloy for cast prosthetic frames in dentistry, consisting of (in % by weight) ______________________________________ 0.1 to 0.3 % C up to 1.5 % Si up to 3 % Mn 25 to 35 % Cr 3 to 6.5 % Mo 0.5 to 5 % Ta 0.15 to 0.40 % N ______________________________________ remainder cobalt and residual impurities.

Inventors

  • 👤 Hans-Hermann Weigand

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 04:57
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/07; A; A61; A61K; A61K6/00; A61K6/80; A61K6/84

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 62 words
A metal alloy for cast prosthetic frames in dentistry, consisting of (in % by weight) ______________________________________ 0.1 to 0.3 % C up to 1.5 % Si up to 3 % Mn 25 to 35 % Cr 3 to 6.5 % Mo 0.5 to 5 % Ta 0.15 to 0.40 % N 0 to 0.5 % B ______________________________________ remainder cobalt, and unavoidable impurities.
Claim 2
Dependent Claim 62 words
A metal alloy for cast prosthetic frames in dentistry, consisting of (in % by weight) ______________________________________ 0.1 to 0.3 % C up to 1.5 % Si up to 3 % Mn 25 to 35 % Cr 3 to 6.5 % Mo 0.5 to 5 % Ta 0.15 to 0.40 % N 0 to 0.5 % B ______________________________________ remainder cobalt, and unavoidable impurities.
Claim 3
Dependent Claim 31 words
A metal alloy as set forth in claim 1 in which the molybdenum content exceeds the tantalum content and their total content (% Mo)+(% Ta) is at least equal to 4.5%.
Claim 4
Dependent Claim 62 words
A metal alloy for cast prosthetic frames in dentistry, consisting of (in % by weight) ______________________________________ 0.1 to 0.3 % C up to 1.5 % Si up to 3 % Mn 25 to 35 % Cr 3 to 6.5 % Mo 0.5 to 5 % Ta 0.15 to 0.40 % N 0.01 to 0.1 % B ______________________________________ remainder cobalt, and unavoidable impurities.
Claim 5
Dependent Claim 62 words
A metal alloy for cast prosthetic frames in dentistry, consisting of (in % by weight) ______________________________________ 0.1 to 0.3 % C up to 1.5 % Si up to 3 % Mn 25 to 35 % Cr 3 to 6.5 % Mo 0.5 to 5 % Ta 0.15 to 0.40 % N 0.01 to 0.1 % B ______________________________________ remainder cobalt, and unavoidable impurities.
Claim 6
Dependent Claim 31 words
A metal alloy as set forth in claim 3 in which the molybdenum content exceeds the tantalum content and their total content (% Mo)+(% Ta) is at least equal to 4.5%.

References Cited (Backward Citations)

DE642040C Cited
US2750283A Cited
DE2225577A1 Cited
US4116724A Cited
US5039574A Cited
JPS613860A Cited
US4728495A Cited
DE3941820A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1996-07-12 1997-01-11 1997-07-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2000-07-12 2001-01-11 2001-07-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2004-07-12 2005-01-11 2005-07-13 $7700.00 Window Closed / Lapsed

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