Patent US2602893A successfully refreshed from Google Patents.
US2602893A
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Wave guide antenna
Assignee: Unisys Corp
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Filing: 1943-07-17
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Granted: 1952-07-08
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Expires: 1963-07-17
Abstract
No abstract record available.
Inventors
- 👤 Jr William Hardy Ratliff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:53
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/44; H01Q3/443; H01Q3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1301644A
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US1562961A
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FR802756A
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AU2315535A
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US2206683A
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US2129669A
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US2197123A
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US2263248A
Cited
US2461005A
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US2408435A
Cited
US2422691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |