US3277020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass composition and electrical resistance material made therefrom
Assignee: International Resistance Co
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Filing: 1963-12-19
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Granted: 1966-10-04
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Expires: 1983-12-19
Abstract
No abstract record available.
Inventors
- 👤 Bhogaraju V Janakirama-Rao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:47
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06573; H01C17/0658; C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/064; C03C3/076; C03C3/089; C03C3/091; C03C4/00; H01C17/06513; H01C17/06526; H01C7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A VITREOUS ENAMEL RESISTOR COMPOSITION ADAPTED TO BE APPLIED TO AND FIRED ON A CERAMIC BODY TO FORM ELECTRICAL RESISTORS COMPRISING A MIXTURE OF FINELY DIVIDED ELECTRICALLY CONDUCTIVE PARTICLES SELECTED FROM THE GROUP CONSISTING OF METALS AND TUNGSTEN CARBIDE, AND A GLASS FRIT, SAID GLASS FRIT CONSISTING ESSENTIALLY OF BY WEIGHT 35 TO 70% BARIUM OXIDE, 0.1 TO 60% BORON OXIDE, 0.1 TO 50% SILICA, AND 0.1 TO 10% TITANIUM OXIDE AND AN OXIDE SELECTED FROM THE GROUP CONSISTING OF ALUMINUM OXIDE AND CALCIUM OXIDE.
Claim 2
Dependent Claim
85 words
A VITREOUS ENAMEL RESISTOR COMPOSITION ADAPTED TO BE APPLIED TO AND FIRED ON A CERAMIC BODY TO FORM ELECTRICAL RESISTORS COMPRISING A MIXTURE OF FINELY DIVIDED ELECTRICALLY CONDUCTIVE PARTICLES SELECTED FROM THE GROUP CONSISTING OF METALS AND TUNGSTEN CARBIDE, AND A GLASS FRIT, SAID GLASS FRIT CONSISTING ESSENTIALLY OF BY WEIGHT 35 TO 70% BARIUM OXIDE, 0.1 TO 60% BORON OXIDE, 0.1 TO 50% SILICA, AND 0.1 TO 10% TITANIUM OXIDE AND AN OXIDE SELECTED FROM THE GROUP CONSISTING OF ALUMINUM OXIDE AND CALCIUM OXIDE.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |