US3387231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circulator for microwave transceivers
Assignee: International Standard Electric Corp
•
Filing: 1964-10-01
•
Granted: 1968-06-04
•
Expires: 1984-10-01
Abstract
No abstract record available.
Inventors
- 👤 Muller Martin
- 👤 Frank Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:30
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/32; H01P1/38; G; G01; G01S; G01S7/00; G01S7/02; G01S7/03; G01S7/034
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2866949A
Cited
US3036278A
Cited
US2972047A
Cited
US3089101A
Cited
US3113269A
Cited
US3095561A
Cited
US3226659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |