US2843676A
Expired / Lapsed
US
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Means for producing dispersion in electrical oscillations
Assignee: Kelvin Hughes Ltd
•
Filing: 1954-03-04
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Granted: 1958-07-15
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Expires: 1974-03-04
Abstract
No abstract record available.
Inventors
- 👤 Halliday William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:22
CPC Classifications
H; H04; H04S; H04S3/00; G; G01; G01S; G01S1/00; G01S1/72; G10; G10K; G10K15/00; G10K15/08; G10K15/10; H03; H03H; H03H7/00; H03H7/30; H04K; H04K1/00; Y; Y10; Y10S; Y10S84/00; Y10S84/29
Claims Analysis
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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) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |