US3145362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical resistance device
Assignee: Emerson Process Management Ltd
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Filing: 1963-01-21
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Granted: 1964-08-18
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Expires: 1983-01-21
Abstract
No abstract record available.
Inventors
- 👤 Lowell A Kleven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:08
CPC Classifications
H; H01; H01C; H01C3/00; H01C3/14; H01C3/20; H01B; H01B1/00; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19949; Y10T74/19953; Y10T74/20; Y10T74/20396; Y10T74/20402; Y10T74/20408
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
103 words
THE COMBINATION COMPRISING A CYLINDRICAL SUPPORT HAVING A SPIRAL GROOVE IN THE OUTER CYLINDRICAL SURFACE THEREOF, SAID GROOVE HAVING A BOTTOM AND BEING OUTWARDLY DIVERGENT AND CHARACTERIZED IN THAT THE INTERSECTION OF THE WALLS OF THE GROOVE AND A PLANE THROUGH THE AXIS OF THE CYLINDRICAL SUPPORT DEFINE LINES WHICH INTERSECT EACH OTHER AT SAID AXIS AND FROM EQUAL AND OPPOSITE ANGLES WITH REFERENCE TO SAID AXIS, AND A SPIRAL ELEMENT COMPOSED OF A ROD OF MATERIAL DIFFERENT FROM THE MATERIAL COMPOSING THE SUPPORT, SAID ROD HAVING A CROSS-SECTIONAL SHAPE AND A SIZE SO AS SIMULTANEOUSLY TO ENGAGE OPPOSED SIDEWALLS OF THE GROOVE.
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) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |