US2428055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite selenium electrode
Assignee: STC PLC
•
Filing: 1943-01-05
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Granted: 1947-09-30
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Expires: 1963-01-05
Abstract
No abstract record available.
Inventors
- 👤 Hippel Arthur Von
- 👤 James H Schulman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:30
CPC Classifications
C; C25; C25D; C25D17/00; C25D17/10; C01; C01B; C01B19/00; C01B19/02; H; H10; H10D; H10D48/00; H10D48/01; H10D48/04; H10D48/043; H10D48/0431; H10D48/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US312948A
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US504703A
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US636142A
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US893565A
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US877408A
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US779733A
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US1999573A
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US2301756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-29 | 1951-03-31 | 1951-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-29 | 1955-03-31 | 1955-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-29 | 1959-03-31 | 1959-09-30 | $7700.00 | Window Closed / Lapsed |