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Patent US4137074A successfully refreshed from Google Patents.
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US4137074A Expired / Lapsed US ⏱️ 0.0 years remaining

Nickel-chromium alloys

Assignee: Individual
•
Filing: 1978-04-17
•
Granted: 1979-01-30
•
Expires: 1998-04-17
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Abstract

Abstract A nickel-chromium alloy composed of the following ingredients in the following ranges of percentage by weight: ______________________________________ Ni 47.00 - 50.00 Cr 34.00 - 40.00 Cu .05 - .08 Fe 3.00 - 6.00 C .18 - .30 Si .75 - 1.50 Mn .10 - .30 Co .75 - 1.50 Mo 2.50 - 3.50 ______________________________________

Inventors

  • 👤 Miles Firnhaber

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 04:14
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/052

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 79 words
An alloy consisting of the following ingredients in percentages by weight: ______________________________________ Ni 47.00 - 57.00 Cr 34.00 - 40.00 Cu .05 - .08 Fe 3.00 - 6.0 C .18 - .30 Si .75 - 1.50 Mn .10 - .30 Co .75 - 1.50 Mo 2.50 - 3.50 ______________________________________ said alloy being characterized by resistance to corrosive attack by molten glass, having superior creep resistance, having strength at elevated temperatures, and imparting resistance to deformation to articles made therefrom.
Claim 2
Dependent Claim 79 words
An alloy consisting of the following ingredients in percentages by weight: ______________________________________ Ni 47.00 - 57.00 Cr 34.00 - 40.00 Cu .05 - .08 Fe 3.00 - 6.0 C .18 - .30 Si .75 - 1.50 Mn .10 - .30 Co .75 - 1.50 Mo 2.50 - 3.50 ______________________________________ said alloy being characterized by resistance to corrosive attack by molten glass, having superior creep resistance, having strength at elevated temperatures, and imparting resistance to deformation to articles made therefrom.
Claim 3
Dependent Claim 77 words
An alloy in which the ingredients are in about the following percentages by weight: ______________________________________ Ni 54.00 Cr 35.00 Cu .05 Fe 4.50 C .27 Si 1.00 Mn .20 Co 1.10 Mo 3.00 ______________________________________ said alloy being characterized by resistance to corrosive attack by molten glass, having superior creep resistance, having strength at elevated temperatures, and imparting resistance to deformation to articles made therefrom and resistance to cracking after prolonged exposure to elevated temperatures above 2000° F.
Claim 4
Dependent Claim 77 words
An alloy in which the ingredients are in about the following percentages by weight: ______________________________________ Ni 54.00 Cr 35.00 Cu .05 Fe 4.50 C .27 Si 1.00 Mn .20 Co 1.10 Mo 3.00 ______________________________________ said alloy being characterized by resistance to corrosive attack by molten glass, having superior creep resistance, having strength at elevated temperatures, and imparting resistance to deformation to articles made therefrom and resistance to cracking after prolonged exposure to elevated temperatures above 2000° F.

References Cited (Backward Citations)

US3876423A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-01-29 1982-07-31 1983-01-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-01-29 1986-07-31 1987-01-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-01-29 1990-07-31 1991-01-30 $7700.00 Window Closed / Lapsed

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