US3681713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High q circuits on ceramic substrates
Assignee: RCA Licensing Corp
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Filing: 1970-02-12
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Granted: 1972-08-01
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Expires: 1990-02-12
Abstract
Abstract High Q circuit for operation in the UHF band comprising a ceramic substrate having on one major surface a pattern of metal particle-glass frit conductors having a coating of copper thereon, and on the other major surface a metallic ground plane of similar structure.
Inventors
- 👤 Robert Stephen Degenkolb
- 👤 Eugene Raymond Skaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:25
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/02; H01P3/08; H01P3/081; H05; H05K; H05K3/00; H05K3/22; H05K3/24; H05K3/245; H05K3/246; H10; H10D; H10D84/00; H10D84/01; H10D86/00; H10D86/80; H10D86/85; H05K1/00; H05K1/02; H05K1/09; H05K1/092
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
18 words
A circuit according to claim 1 in which said copper layer is about 0.0002 to 0.0005 inch thick.
Claim 2
Dependent Claim
18 words
A circuit according to claim 2 in which said silver particle-glass frit composition contains about 95 percent silver.
Claim 3
Dependent Claim
17 words
A circuit according to claim 3 in which said ceramic substrate has a thickness of 0.050 inch.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |