US2825031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of converting modes of wave motion for transmission from rectangular to circular wave guides
Assignee: Individual
•
Filing: 1951-12-15
•
Granted: 1958-02-25
•
Expires: 1971-12-15
Abstract
No abstract record available.
Inventors
- 👤 Frank E Parisi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:10
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/16; H01P1/163; H01P5/00; H01P5/08; H01P5/082
Claims Analysis
Total Claims: 0
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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) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |