US2328946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission of electrical signals having direct current components
Assignee: EMI Ltd
•
Filing: 1940-11-19
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Granted: 1943-09-07
•
Expires: 1960-11-19
Abstract
No abstract record available.
Inventors
- 👤 Alan D Blumlein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:53
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/20; H03B5/22; H03B5/08; H03B5/10; H04; H04N; H04N5/00; H04N5/14; H04N5/16; H04N5/165; H04N5/44; H04N5/52
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) | 1946-09-06 | 1947-03-08 | 1947-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-09-06 | 1951-03-08 | 1951-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-09-06 | 1955-03-08 | 1955-09-07 | $7700.00 | Window Closed / Lapsed |