US3013209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coherent memory filter
Assignee: Individual
•
Filing: 1958-06-09
•
Granted: 1961-12-12
•
Expires: 1978-06-09
Abstract
No abstract record available.
Inventors
- 👤 Henry J Bickel
- 👤 Robert I Bernstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:35
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/002; H03; H03H; H03H15/00; H03H17/00; H03H17/02
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |