Patent US2218641A successfully refreshed from Google Patents.
Patent US2557480A successfully refreshed from Google Patents.
US2557480A
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Selector switching apparatus
Assignee: Individual
•
Filing: 1947-10-02
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Granted: 1951-06-19
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Expires: 1967-10-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Richard L Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:05
CPC Classifications
H; H03; H03J; H03J5/00; H03J5/24; H03J5/26; H03J5/28; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18992
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US941428A
Cited
US1158083A
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US1999313A
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US2064828A
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US2213845A
Cited
US2196443A
Cited
US2354779A
Cited
US2443635A
Cited
US2432476A
Cited
US2475647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |