Patent US5041089A successfully refreshed from Google Patents.
Patent US2943321A successfully refreshed from Google Patents.
US2943321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Course guidance system
Assignee: TDK Micronas GmbH
•
Filing: 1958-01-06
•
Granted: 1960-06-28
•
Expires: 1978-01-06
Abstract
No abstract record available.
Inventors
- 👤 Mark A Karpeles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:50
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/0202; G01; G01S; G01S1/00; G01S1/02
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) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |