US2850705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ridged ferrite waveguide device
Assignee: Individual
•
Filing: 1955-04-18
•
Granted: 1958-09-02
•
Expires: 1975-04-18
Abstract
No abstract record available.
Inventors
- 👤 Herman N Chait
- 👤 Morris L Kales
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:10
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/32; H01P1/38; H01P1/393
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2317503A
Cited
US2422058A
Cited
US2546840A
Cited
US2644930A
Cited
US2611094A
Cited
US2719274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |