US2858535A
Expired / Lapsed
US
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Microwave polarization apparatus
Assignee: Laboratory For Electronics Inc
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Filing: 1955-07-29
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Granted: 1958-10-28
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Expires: 1975-07-29
Abstract
No abstract record available.
Inventors
- 👤 Paul A Crandell
- 👤 John B Levin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:21
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/24; H01Q21/245; H01P; H01P1/00; H01P1/165; H01P1/17
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) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |