US2633544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillating electric motor
Assignee: American Optical Corp
•
Filing: 1949-09-03
•
Granted: 1953-03-31
•
Expires: 1969-09-03
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Herr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:06
CPC Classifications
H; H02; H02K; H02K33/00; H02K33/02; H02K33/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US672655A
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US927859A
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US943890A
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US1458658A
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US1918690A
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US2289227A
Cited
US2253033A
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US2471618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |