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US4385127A Expired / Lapsed US ⏱️ 0.0 years remaining

Glass-ceramic coatings for use on metal substrates

Assignee: Corning Glass Works
•
Filing: 1981-11-23
•
Granted: 1983-05-24
•
Expires: 2001-11-23
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Abstract

Abstract The instant invention is concerned with the preparation of glass-ceramic coatings capable of being fired repeatedly to temperatures in excess of 950° C. without thermal deformation and being particularly suitable for application to low carbon and titanium-stabilized stainless steels. The coatings are substantially free from alkali metal oxides and consist essentially, expressed in terms of weight percent on the oxide basis, of: ______________________________________ BaO 10-60 B 2 O 3 5-30 SiO 2 25-40 Al 2 O 3 0-15 CaO 0-15 MgO 10-35 ZnO 0-16 Al 2 O 3 + CaO + ZnO 5-20 ______________________________________

Inventors

  • 👤 Kenneth Chyung

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 14:51
CPC Classifications
C; C23; C23D; C23D5/00; C23D5/02; C03; C03C; C03C10/00; C03C10/0054; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/05; H05K1/053

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 79 words
Glass-ceramic coating compositions capable of being fired repeatedly to temperatures greater than 950° C. without undergoing thermal deformation and exhibiting coefficients of thermal expansion (25°-600° C.) between about 75-150×10 -7 /°C. which have compositions essentially free from alkali metal oxides and consist essentially, expressed in terms of weight percent on the oxide basis, of: ______________________________________ BaO 10-60 B.sub.2 O.sub.3 5-30 SiO.sub.2 25-40 Al.sub.2 O.sub.3 0-15 CaO 0-15 MgO 10-35 ZnO 0-16 Al.sub.2 O.sub.3 + CaO + ZnO 5-20 ______________________________________
Claim 2
Dependent Claim 79 words
Glass-ceramic coating compositions capable of being fired repeatedly to temperatures greater than 950° C. without undergoing thermal deformation and exhibiting coefficients of thermal expansion (25°-600° C.) between about 75-150×10 -7 /°C. which have compositions essentially free from alkali metal oxides and consist essentially, expressed in terms of weight percent on the oxide basis, of: ______________________________________ BaO 10-60 B.sub.2 O.sub.3 5-30 SiO.sub.2 25-40 Al.sub.2 O.sub.3 0-15 CaO 0-15 MgO 10-35 ZnO 0-16 Al.sub.2 O.sub.3 + CaO + ZnO 5-20 ______________________________________
Claim 3
Dependent Claim 35 words
Glass-ceramic coating compositions according to claim 1 consisting essentially of: ______________________________________ BaO 10-40 B.sub.2 O.sub.3 6-25 SiO.sub.2 25-38 MgO 10-30 CaO 0-15 ZnO 0-16 Al.sub.2 O.sub.3 0-10 CaO + ZnO + Al.sub.2 O.sub.3 5-18 ______________________________________

References Cited (Backward Citations)

US3022179A Cited
US3848079A Cited
US4256796A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-05-23 1986-11-22 1987-05-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-05-23 1990-11-22 1991-05-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-05-23 1994-11-22 1995-05-24 $7700.00 Window Closed / Lapsed

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