US2531389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making capacitors
Assignee: Individual
•
Filing: 1944-07-28
•
Granted: 1950-11-28
•
Expires: 1964-07-28
Abstract
No abstract record available.
Inventors
- 👤 Kristian H Brandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:40
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/32; H01G13/00; H01G13/02; H01G4/30; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435; Y10T29/49; Y10T29/49826; Y10T29/49888
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US425020A
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US1307341A
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US1721503A
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US1650395A
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US1745400A
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US1785479A
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US1870949A
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US1892755A
Cited
US2238031A
Cited
US2387759A
Cited
US2368458A
Cited
US2389420A
Cited
US2399313A
Cited
US2395442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |