US3293587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical resistor and the like
Assignee: Sprague Electric Co
•
Filing: 1965-10-20
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Granted: 1966-12-20
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Expires: 1985-10-20
Abstract
No abstract record available.
Inventors
- 👤 Robinson Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:49
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/22; H01C17/24; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49082; Y10T29/49099; Y10T29/49117; Y10T29/49124; Y10T29/49155; Y10T29/49156
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A RESISTOR HAVING A CYLINDRICAL CERAMIC MEMBER CARRYING ON THE OUTSIDE OF ITS CYLINDRICAL SURFACE A NUMBER OF CLOSELY SPACED TURNS OF HELICAL ELECTRICALLY CONDUCTIVE COATING OF METALLIC ELECTRICAL RESISTANCE MATERIAL IN WHICH THE SIDE EDGES OF THE TURNS ARE MICROSCOPICALLY SMOOTH AND STRAIGHT, THE SURFACE OF THE CERAMIC MEMBER BEING GLAZED IN THE SPACES BETWEEN TURNS AND RECESSED BELOW THE CERAMIC SURFACE ON WHICH THE TURNS ARE COATED,
Claim 2
Dependent Claim
69 words
A RESISTOR HAVING A CYLINDRICAL CERAMIC MEMBER CARRYING ON THE OUTSIDE OF ITS CYLINDRICAL SURFACE A NUMBER OF CLOSELY SPACED TURNS OF HELICAL ELECTRICALLY CONDUCTIVE COATING OF METALLIC ELECTRICAL RESISTANCE MATERIAL IN WHICH THE SIDE EDGES OF THE TURNS ARE MICROSCOPICALLY SMOOTH AND STRAIGHT, THE SURFACE OF THE CERAMIC MEMBER BEING GLAZED IN THE SPACES BETWEEN TURNS AND RECESSED BELOW THE CERAMIC SURFACE ON WHICH THE TURNS ARE COATED,
References Cited (Backward Citations)
US1859112A
Cited
US2671735A
Cited
US3107179A
Cited
US3140379A
Cited
US3136973A
Cited
US3162767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |