US2997318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing rings for rods and shafts
Assignee: Parker Hannifin Corp
•
Filing: 1957-08-01
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Granted: 1961-08-22
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Expires: 1977-08-01
Abstract
No abstract record available.
Inventors
- 👤 Zdenek J Lansky
- 👤 Martin T Mulroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:49
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/166; F16J15/32; F16J15/3204; F16J15/3232; F16J15/3236
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2182034A
Cited
US2415887A
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US2443332A
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US2547185A
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US2509436A
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US2656820A
Cited
US2639198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |