US2607849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of polarization in wave guides and wave guide systems
Assignee: Individual
•
Filing: 1943-10-02
•
Granted: 1952-08-19
•
Expires: 1963-10-02
Abstract
No abstract record available.
Inventors
- 👤 Edward M Purcell
- 👤 Carol G Montgomery
- 👤 Montgomery Dorothy Durfee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:00
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/16; H01P1/161; G; G01; G01S; G01S7/00; G01S7/02; G01S7/03; G01S7/034; H01P1/165; H01P1/17; H01P1/172
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2197123A
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US2235010A
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US2433368A
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US2407318A
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US2438119A
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US2425345A
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US2403289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |