US2993131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Small electric motor
Assignee: Dictaphone Corp
•
Filing: 1955-03-28
•
Granted: 1961-07-18
•
Expires: 1975-03-28
Abstract
No abstract record available.
Inventors
- 👤 John H Trevitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:37
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/128; H02K5/16; H02K5/173; H02K5/1732
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2004866A
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US2396738A
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US2463936A
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CH269308A
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US2573126A
Cited
US2721280A
Cited
US2730636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |