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Patent US2533716A successfully refreshed from Google Patents.
US2533716A
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US
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Electrical condenser
Assignee: ENGINEERING DEV LAB Inc
•
Filing: 1947-02-28
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Granted: 1950-12-12
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Expires: 1967-02-28
Abstract
No abstract record available.
Inventors
- 👤 Coursey Philip Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:18
CPC Classifications
H; H01; H01G; H01G13/00; H01G13/02; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1303325A
Cited
US728780A
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US850166A
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US1744616A
Cited
US1573853A
Cited
US1960944A
Cited
GB452030A
Cited
GB521604A
Cited
GB541096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |