US3523692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Patterned sealing face for shaft seals
Assignee: Timken Co
•
Filing: 1967-05-17
•
Granted: 1970-08-11
•
Expires: 1987-05-17
Abstract
No abstract record available.
Inventors
- 👤 Dennis L Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:28
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/3456
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2210821A
Cited
US2958551A
Cited
DE1101074B
Cited
FR1227078A
Cited
US3048413A
Cited
FR1469429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |