US3555485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin film resistor
Assignee: Angstrohm Precision Inc
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Filing: 1969-03-27
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Granted: 1971-01-12
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Expires: 1989-03-27
Abstract
Abstract A RESISTIVE FILM IS DEPOSITED IN A GROOVE FORMED IN AN APPROPRIATE SUBSTRATE AND A PAIR OF TERMINAL PORTIONS FORMED ON THIS SUBSTRATE ARE CONNECTED TO RESPECTIVE OPPOSITE ENDS OF THE FILM AND ARE ESPECIALLY ADAPTED TO INTERCONNECT THE RESISTOR IN PRINTED OR ETCHED CIRCUITS. A PROTECTIVE MATERIAL CAN BE PROVIDED OVER THE FILM TO PREVENT CONTAMINATION. THE VALVE OF RESISTANCE IS ADJUSTABLE BY GRINDING OR OTHERWISE REMOVING A PORTION OF THE FILM AT THE UPPER EDGES OF THE GROOVE, UNTIL THE DESIRED VALUE IS ACHIEVED.
Inventors
- 👤 Benjamin Solow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:17
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/006; H01C1/00; H01C1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |