US3489419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static pressure system for mechanical seals
Assignee: King Of Prussia Research & Dev
•
Filing: 1967-11-01
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Granted: 1970-01-13
•
Expires: 1987-11-01
Abstract
No abstract record available.
Inventors
- 👤 Andrew Stratienko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:27
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3404; Y; Y10; Y10S; Y10S277/00; Y10S277/926; Y10S277/93
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE496363C
Cited
US2628852A
Cited
US2687096A
Cited
US2824759A
Cited
US3106099A
Cited
US3220801A
Cited
US3301191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |