US3525529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Replacement of underwater seals
Assignee: Union Oil Company of California
•
Filing: 1968-05-20
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Granted: 1970-08-25
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Expires: 1988-05-20
Abstract
No abstract record available.
Inventors
- 👤 Paul E Pfeifer
- 👤 Joseph B Stucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:56
CPC Classifications
B; B63; B63H; B63H23/00; B63H23/32; B63H23/321; F; F16; F16J; F16J15/00; F16J15/002; F16J15/008; B63H2023/327; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49718; Y10T29/49719
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) | 1973-08-24 | 1974-02-23 | 1974-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-24 | 1978-02-23 | 1978-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-24 | 1982-02-23 | 1982-08-25 | $7700.00 | Window Closed / Lapsed |