US2809733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic fluid seals in magnetic clutches
Assignee: Texas Instruments Inc
•
Filing: 1952-10-29
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Granted: 1957-10-15
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Expires: 1972-10-29
Abstract
No abstract record available.
Inventors
- 👤 Perry Edward Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:24
CPC Classifications
F; F16; F16D; F16D37/00; F16D37/02; F16J; F16J15/00; F16J15/16; F16J15/40; F16J15/43; F16D2037/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2587077A
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FR976917A
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US2557140A
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US2663809A
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US2519449A
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US2614668A
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US2651754A
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US2713927A
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US2725133A
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US2601961A
Cited
US2748911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |