US3381968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearing seal
Assignee: Smith Industries International Inc
•
Filing: 1965-08-17
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Granted: 1968-05-07
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Expires: 1985-08-17
Abstract
No abstract record available.
Inventors
- 👤 William J Neilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:13
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; E21B10/25; F; F16; F16F; F16F1/00; F16F1/02; F16F1/32; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/3456; F16J15/50; F16J15/52
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) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |