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US2446254A
Expired / Lapsed
US
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Blocking-layer cell
Assignee: Hartford National Bank and Trust Co
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Filing: 1945-09-20
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Granted: 1948-08-03
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Expires: 1965-09-20
Abstract
No abstract record available.
Inventors
- 👤 Johannes Jacobus Asuerus P Ams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:46
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/04; H10D99/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9335; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12389; Y10T428/12486; Y10T428/12493; Y10T428/12528; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/23; Y10T428/239; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-03 | 1952-02-02 | 1952-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-03 | 1956-02-02 | 1956-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-03 | 1960-02-02 | 1960-08-03 | $7700.00 | Window Closed / Lapsed |