US2680410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-lubricated rotating seal for centrifugal pumps
Assignee: Standard Oil Co
•
Filing: 1951-01-02
•
Granted: 1954-06-08
•
Expires: 1971-01-02
Abstract
No abstract record available.
Inventors
- 👤 Ray M Kolb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:43
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/162; F04; F04D; F04D15/00; F04D15/0077; F04D29/00; F04D29/04; F04D29/041; F04D29/0416; F04D29/08; F04D29/10; F04D29/106; F04D29/16; F04D29/165; F04D29/167; F16J15/18; F16J15/182
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2508097A
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US2465930A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |