Patent US3512517A successfully refreshed from Google Patents.
US2565159A
Expired / Lapsed
US
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Focused electromechanical device
Assignee: Brush Development Co
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Filing: 1949-04-21
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Granted: 1951-08-21
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Expires: 1969-04-21
Abstract
No abstract record available.
Inventors
- 👤 Alfred L W Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:38
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/32; Y; Y10; Y10S; Y10S116/00; Y10S116/18
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) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |