US3534378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide band antenna for satellite navigation and related problems
Assignee: CHU ASSOCIATES
•
Filing: 1967-12-13
•
Granted: 1970-10-13
•
Expires: 1987-12-13
Abstract
No abstract record available.
Inventors
- 👤 Valor C Smith Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:01
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/44; H01Q1/00; H01Q1/48; H01Q5/00; H01Q5/30; H01Q5/307; H01Q5/342; H01Q5/357; H01Q5/364; H01Q5/371
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2267889A
Cited
US2724052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |