Patent US2389419A successfully refreshed from Google Patents.
US2389419A
Expired / Lapsed
US
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Preparation of electrical capacttors
Assignee: EIDP Inc
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Filing: 1943-10-04
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Granted: 1945-11-20
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Expires: 1963-10-04
Abstract
No abstract record available.
Inventors
- 👤 Alden J Deyrup
- 👤 Kermit H Ballard
- 👤 John J Strickarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:30
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/30; Y; Y10; Y10S; Y10S264/00; Y10S264/57; Y10T; Y10T29/00; Y10T29/43; Y10T29/435; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12049; Y10T428/12056; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12896
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-11-19 | 1949-05-21 | 1949-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-11-19 | 1953-05-21 | 1953-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-11-19 | 1957-05-21 | 1957-11-20 | $7700.00 | Window Closed / Lapsed |