Patent US2908516A successfully refreshed from Google Patents.
US2908516A
Expired / Lapsed
US
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Circumferential shaft seal
Assignee: Beazer East Inc
•
Filing: 1954-08-02
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Granted: 1959-10-13
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Expires: 1974-08-02
Abstract
No abstract record available.
Inventors
- 👤 Stein Philip Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:53
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/44; F16J15/441; F16J15/16; F16J15/26; F16J15/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US674325A
Cited
US688790A
Cited
US774886A
Cited
US1828178A
Cited
US1891436A
Cited
US1999094A
Cited
US2723867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |