US2617936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delay lens for microwaves
Assignee: Unisys Corp
•
Filing: 1949-01-11
•
Granted: 1952-11-11
•
Expires: 1969-01-11
Abstract
No abstract record available.
Inventors
- 👤 Seymour B Cohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:29
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CH230166A
Cited
US2508479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |