US2987652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overload protective device for polyphase system
Assignee: Individual
•
Filing: 1958-10-20
•
Granted: 1961-06-06
•
Expires: 1978-10-20
Abstract
No abstract record available.
Inventors
- 👤 Winifred J Turnupseed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:15
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H71/14; H01H71/16; H01H71/162; H02; H02H; H02H3/00; H02H3/08; H02H3/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2338474A
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US2306810A
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US2303153A
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US2411351A
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US2412483A
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US2494346A
Cited
US2534103A
Cited
US2748320A
Cited
US2742547A
Cited
US2838718A
Cited
US2924817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |