US3837869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Celsian containing dielectric crossover compositions
Assignee: EIDP Inc
•
Filing: 1972-07-20
•
Granted: 1974-09-24
•
Expires: 1992-07-20
Abstract
Abstract Improved crossover dielectric compositions which are finely divided powders of glass and preformed celsian; the compositions are capable of producing printed capacitors of reduced dielectric constant.
Inventors
- 👤 R Bacher
- 👤 T Nakayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:21
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/07; C03C10/00; C03C10/0036; C03C4/00; C03C4/16; H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/129; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K3/00; H05K3/46; H05K3/4685
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
12 words
Improved compositions according to claim 1 dispersed in an inert liquid vehicle.
Claim 2
Dependent Claim
23 words
Improved compositions according to claim 1 comprising an amount of celsian in the range 10-75 percent of the total weight of said composition.
Claim 3
Dependent Claim
55 words
Improved compositions of glass and celsian according to claim 1 wherein up to 50 percent of the glass is a partially crystallizable glass of, by weight, 20-38% SiO2 21-45% PbO 1-25% Al2O3 2-20% TiO2 2-15% BaO 0-25% ZnO 0-15% PbF2 0-5% SrO 0-5% ZrO2 0 5% Ta2O5 0-5% WO3 0-5% CdO 0-5% SnO2 0-5% Sb2O3
Claim 4
Dependent Claim
53 words
Improved compositions according to claim 4 wherein up to 50 percent of the weight of the glass is a partially crystallizable glass of, by weight, 22-32% SiO2 22-42% PbO 9-13% Al2O3 3-15% TiO2 4-12% BaO 0-20% ZnO 0-10% PbF2 0-4% SrO 0-4% ZrO 0-4% Ta2O5 0-4% WO3 0-4% CdO 0-4% SnO2 0-4% Sb2O3
Claim 5
Dependent Claim
55 words
Improved compositions according to claim 4 wherein at least 50 percent of the total weight of glass and celsian is celsian plus a partially crystallizable glass of 20-38% SiO2 21-45% PbO 1-25% Al2O3 2-20% TiO2 2-15% BaO 0-25% ZnO 0-15% PbF2 0-5% SrO 0-5% ZrO2 0-5% Ta2O5 0-5% WO3 0-5% CdO 0-5% SnO2 0-5% Sb2O3
Claim 6
Dependent Claim
11 words
Compositions according to claim 4 dispersed in an inert liquid vehicle.
Claim 7
Dependent Claim
11 words
Compositions according to claim 5 dispersed in an inert liquid vehicle.
References Cited (Backward Citations)
US3656984A
Cited
US3785837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |