US3401989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure shaft seals
Assignee: Houdaille Industries Inc
•
Filing: 1966-03-30
•
Granted: 1968-09-17
•
Expires: 1986-03-30
Abstract
No abstract record available.
Inventors
- 👤 Paul E Gies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:52
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/166
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2974983A
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US2862736A
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US2973978A
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US3088759A
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US3033578A
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US3172670A
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US3179018A
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US3323806A
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US3282289A
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US3300225A
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US3261613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |