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US4591574A Expired / Lapsed US ⏱️ 0.0 years remaining

Alumina porcelain composition

Assignee: Niterra Co Ltd
•
Filing: 1985-02-21
•
Granted: 1986-05-27
•
Expires: 2005-02-21
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Abstract

Abstract An aluminum porcelain composition, is described, of the ternary Al 2 O 3 --CaO--TiO 2 system, having a compositional range defined by points A, B, C, and D in the composition diagram set forth in the drawing, wherein the points A, B, C, and D represent the following molar fractions of Al 2 O 3 , CaO, and TiO 2 : ______________________________________ Al 2 O 3 CaO TiO 2 ______________________________________ point A 0.94 0.04 0.02 point B 0.81 0.14 0.05 point C 0.81 0.02 0.17 point D 0.94 0.01 0.05. ______________________________________

Inventors

  • 👤 Minato Ando
  • 👤 Masaaki Ito
  • 👤 Fumio Mizuno

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 15:40
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/111

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 86 words
An aluminum porcelain composition of the ternary Al 2 O 3 --CaO--TiO 2 system having a compositional range defined by points A, B, C and D in the composition diagram set forth in the drawing, wherein the points A, B, C, and D represent the following molar fractions of Al 2 O 3 , CaO, and TiO 2 : ______________________________________ Al.sub.2 O.sub.3 CaO TiO.sub.2 ______________________________________ point A 0.94 0.04 0.02 point B 0.81 0.14 0.05 point C 0.81 0.02 0.17 point D 0.94 0.01 0.05. ______________________________________
Claim 2
Dependent Claim 86 words
An aluminum porcelain composition of the ternary Al 2 O 3 --CaO--TiO 2 system having a compositional range defined by points A, B, C and D in the composition diagram set forth in the drawing, wherein the points A, B, C, and D represent the following molar fractions of Al 2 O 3 , CaO, and TiO 2 : ______________________________________ Al.sub.2 O.sub.3 CaO TiO.sub.2 ______________________________________ point A 0.94 0.04 0.02 point B 0.81 0.14 0.05 point C 0.81 0.02 0.17 point D 0.94 0.01 0.05. ______________________________________

References Cited (Backward Citations)

US4307198A Cited
JPS5795872A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1989-05-26 1989-11-25 1990-05-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-05-26 1993-11-25 1994-05-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-05-26 1997-11-25 1998-05-27 $7700.00 Window Closed / Lapsed

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