US2834618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid seal for rotary shafts
Assignee: Individual
•
Filing: 1953-05-21
•
Granted: 1958-05-13
•
Expires: 1973-05-21
Abstract
No abstract record available.
Inventors
- 👤 Sumner D Wiltse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:16
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; F16J15/42; F16J15/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1014850A
Cited
US2262687A
Cited
US2665929A
Cited
US2557140A
Cited
GB656713A
Cited
US2600321A
Cited
US2644804A
Cited
US2606044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |