Patent US4829032A successfully refreshed from Google Patents.
US4829032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric ceramic composition
Assignee: Niterra Co Ltd
•
Filing: 1987-01-16
•
Granted: 1989-05-09
•
Expires: 2007-01-16
Abstract
Abstract A dielectric ceramic composition suitable for use in microwave regions including a mixture of 15-25 mol % of BaO and 85-75 mol % of TiO 2 , and Ba(Ni 1/3 Ta 2/3 )O 3 in an amount of less than 0.2% based on the weight of the mixture. The ceramic composition may further include one or more metal oxides selected from La 2 O 3 , Sb 2 O 3 , Fe 2 O 3 and Ta 2 O 5 in an amount of 0.1-1.2% based on the weight of said mixture.
Inventors
- 👤 Mizuno Fumio
- 👤 Ito Kenji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:55
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
48 words
A dielectric composition consisting essentially of a mixture of 15-25 mol % of BaO and 85-75 mol % of TiO 2 , and an effective amount of Ba(Ni 1/3 Ta 2/3 )O 3 of more than zero and less than 0.2% based on the weight of the mixture.
Claim 2
Dependent Claim
48 words
A dielectric composition consisting essentially of a mixture of 15-25 mol % of BaO and 85-75 mol % of TiO 2 , and an effective amount of Ba(Ni 1/3 Ta 2/3 )O 3 of more than zero and less than 0.2% based on the weight of the mixture.
Claim 3
Dependent Claim
57 words
A dielectric composition consisting essentially of a mixture of 15-25 mol % of BaO and 85-75 mol % of TiO 2 , an effective amount of Ba(Ni 1/3 Ta 2/3 )O 3 of more than zero and less than 0.2%, and MnO 2 in an amount of up to 0.4% based on the weight of said mixture.
Claim 4
Dependent Claim
57 words
A dielectric composition consisting essentially of a mixture of 15-25 mol % of BaO and 85-75 mol % of TiO 2 , an effective amount of Ba(Ni 1/3 Ta 2/3 )O 3 of more than zero and less than 0.2%, and MnO 2 in an amount of up to 0.4% based on the weight of said mixture.
Claim 5
Dependent Claim
83 words
A dielectric composition consisting essentially of a mixture of 15-25 mol % of BaO and 85-75 mol % of TiO 2 , an effective amount of Ba(Ni 1/3 Ta 2/3 )O 3 of more than zero and less than 0.2%, and at least one metal oxide selected from the group consisting of La 2 O 3 , Sb 2 O 3 , Fe 2 O 3 and Ta 2 O 5 in an amount of 0.1-1.2% based on the weight of said mixture.
Claim 6
Dependent Claim
83 words
A dielectric composition consisting essentially of a mixture of 15-25 mol % of BaO and 85-75 mol % of TiO 2 , an effective amount of Ba(Ni 1/3 Ta 2/3 )O 3 of more than zero and less than 0.2%, and at least one metal oxide selected from the group consisting of La 2 O 3 , Sb 2 O 3 , Fe 2 O 3 and Ta 2 O 5 in an amount of 0.1-1.2% based on the weight of said mixture.
Claim 7
Dependent Claim
92 words
A dielectric composition consisting essentially of a mixture of 15-25 mol % of BaO and 85-75 mol % of TiO 2 , an effective amount of Ba(Ni 1/3 Ta 2/3 )O 3 of more than zero and less than 0.2%, at least one metal oxide selected from the group consisting of La 2 O 3 , Sb 2 O 3 , Fe 2 O 3 and Ta 2 O 5 in an amount of 0.1-1.2%, and MnO 2 in an amount of up to 0.4% based on the weight of said mixture.
Claim 8
Dependent Claim
92 words
A dielectric composition consisting essentially of a mixture of 15-25 mol % of BaO and 85-75 mol % of TiO 2 , an effective amount of Ba(Ni 1/3 Ta 2/3 )O 3 of more than zero and less than 0.2%, at least one metal oxide selected from the group consisting of La 2 O 3 , Sb 2 O 3 , Fe 2 O 3 and Ta 2 O 5 in an amount of 0.1-1.2%, and MnO 2 in an amount of up to 0.4% based on the weight of said mixture.
References Cited (Backward Citations)
US29484A
Cited
CA460764A
Cited
US3464785A
Cited
USRE29484E
Cited
JPS5058599A
Cited
US4468472A
Cited
US4550089A
Cited
US4699891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |