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Patent US2328440A successfully refreshed from Google Patents.
US2328440A
Expired / Lapsed
US
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Blocking layer cell
Assignee: Individual
•
Filing: 1941-07-02
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Granted: 1943-08-31
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Expires: 1961-07-02
Abstract
No abstract record available.
Inventors
- 👤 Esselin Ludovicus Au Lambertus
- 👤 Willem Christiaan Van Geel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:38
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/07; H10D48/04; H10D48/043; H10D48/046; H10D99/00
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) | 1946-08-30 | 1947-03-01 | 1947-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-08-30 | 1951-03-01 | 1951-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-08-30 | 1955-03-01 | 1955-08-31 | $7700.00 | Window Closed / Lapsed |