US2806190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low power factor capacitor
Assignee: Sprague Electric Co
•
Filing: 1952-11-06
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Granted: 1957-09-10
•
Expires: 1972-11-06
Abstract
No abstract record available.
Inventors
- 👤 Robinson Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:00
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/14; H01G4/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
23 words
A CAPACITOR HAVING SPACED ELECTRODES OF OPPOSITE POLARITY SEPARATED BY DIELECTRICS MADE OF CELLULOSE WHICH HAS BEEN REACTED WITH AN ORGANIC POLYISOCYANATE.OSE WHICH
References Cited (Backward Citations)
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US2333922A
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US2535690A
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US2576045A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |