US2860267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamoelectric machines
Assignee: Singer Co
•
Filing: 1955-03-16
•
Granted: 1958-11-11
•
Expires: 1975-03-16
Abstract
No abstract record available.
Inventors
- 👤 Frank A Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:36
CPC Classifications
H; H02; H02K; H02K23/00; H02K23/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US262136A
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US377683A
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GB191300802A
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US1803493A
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DE712845C
Cited
FR852367A
Cited
US2385101A
Cited
DE894588C
Cited
DE892303C
Cited
GB619481A
Cited
GB673793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |