Patent US3709566A successfully refreshed from Google Patents.
US2915089A
Expired / Lapsed
US
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Resilient centering device for concentric cylindrical members
Assignee: Individual
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Filing: 1958-03-24
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Granted: 1959-12-01
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Expires: 1978-03-24
Abstract
No abstract record available.
Inventors
- 👤 Sr William F Horsting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:22
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/08; E04C5/10; E21; E21B; E21B17/00; E21B17/10; E21B17/1014; E21B17/1021; E21B17/1028; F; F16; F16L; F16L7/00; Y; Y10; Y10T; Y10T82/00; Y10T82/25; Y10T82/2593; Y10T82/2595
Claims Analysis
Total Claims: 0
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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) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |