Patent US2933689A successfully refreshed from Google Patents.
US2933689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gated amplitude discriminator
Assignee: Bendix Aviation Corp
•
Filing: 1958-04-04
•
Granted: 1960-04-19
•
Expires: 1978-04-04
Abstract
No abstract record available.
Inventors
- 👤 Robert P Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:24
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/54; H03K21/00; H03K9/00; H03K9/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |