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US2783401A
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Seal and magnetic drive
Assignee: Standard Oil Co
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Filing: 1952-09-11
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Granted: 1957-02-26
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Expires: 1972-09-11
Abstract
No abstract record available.
Inventors
- 👤 Norman G Foster
- 👤 Jr Louis E Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:52
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/10; H02K49/104; H02K49/108; H02K5/00; H02K5/04; H02K5/12; H02K5/128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE478002C
Cited
GB235022A
Cited
US1962538A
Cited
US2613176A
Cited
US2560940A
Cited
US2601076A
Cited
US2589134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |