US2588249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave polarization shifter systems
Assignee: AT&T Inc
•
Filing: 1946-01-22
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Granted: 1952-03-04
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Expires: 1966-01-22
Abstract
No abstract record available.
Inventors
- 👤 Winston E Kock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:14
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/24; H01Q15/242; H01Q15/244
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1898787A
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US2129712A
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US2129669A
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US2416675A
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US2405242A
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US2415807A
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US2411872A
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US2442951A
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US2437281A
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US2479673A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |