Patent US20030115291A1 successfully refreshed from Google Patents.
US3371937A
Expired / Lapsed
US
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Sealing device for bearings
Assignee: NTN Corp
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Filing: 1965-06-07
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Granted: 1968-03-05
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Expires: 1985-06-07
Abstract
No abstract record available.
Inventors
- 👤 Maeda Osamu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:48
CPC Classifications
B; B61; B61F; B61F15/00; B61F15/20; B61F15/22; Y; Y10; Y10S; Y10S277/00; Y10S277/925; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49876
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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |