US3521228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Course center line generator for aircraft displays
Assignee: Rockwell Collins ElectroMechanical Systems Inc
•
Filing: 1967-01-13
•
Granted: 1970-07-21
•
Expires: 1987-01-13
Abstract
No abstract record available.
Inventors
- 👤 Paul C Congleton
- 👤 Hideki D Izumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:39
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02; G01S1/04; G01S1/047; G01C; G01C23/00; G01C23/005; G01S13/00; G01S13/88; G01S13/882
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2262245A
Cited
USRE25756E
Cited
US3418459A
Cited
US3237193A
Cited
US3331069A
Cited
US3309659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |