US3401452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a precision electric fuse
Assignee: Electra Midland Corp
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Filing: 1966-04-28
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Granted: 1968-09-17
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Expires: 1986-04-28
Abstract
No abstract record available.
Inventors
- 👤 Randall C Ragan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:08
CPC Classifications
H; H01; H01H; H01H69/00; H01H69/02; H01H69/022; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49107
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
152 words
A METHOD OF PRODUCING A PRECISION ELECTRICAL FUSE FOR PROTECTING AN ELECTRIC CIRCUIT, SAID LMETHOD COMPRISING THE STEPS OF PROVIDING A GLASS SUBSTRATE HAVING LOW THERMAL CONDUCTIVITY AND HIGH SURFACE AND VOLUME ELECTRICAL RESISTIVITY, DEPOSITING A PAIR OF SPACED APART SILVER ELECTRODE FILMS ON THE SURFACE OF SAID SUBSTRATE IN INTIMATE CONTACT THEREWITH, DEPOSITING A PAIR OF SPACED APART GOLD TERMINAL FILMS ON THE OPPOSED ENDS OF SAID SILVER FILMS, DEPOSITING A THIN FILM OF ELECTRICALLY CONDUCTIVE FUSE METAL SELECTED FROM THE GROUP CONSISTING OF GOLD AND PLATINUM EXTENDING BETWEEN AND ELECTRICALLY CONNECTING SAID GOLD TERMINAL FILMS ON THE SURFACE OF SAID SUBSTRATE, SAID FUSE METAL BEING ADAPTED TO BLOW WHEN THE ELECTRICAL CURRENT THERETHROUGH EXCEEDS A PREDETERMINED LEVEL, COVERING SAID FUSE METAL WITH A COATING OF LEAD-BORO-SILICATE GLASS FOR QUENCHING AND ABSORBING THE FUSE METAL AS IT IS BLOWN WHEREBY ANY ARCS WHICH TEND TO DEVELOP ACROSS THE BLOWN FUSE METAL
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) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |