US2642226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keyboard
Assignee: —
•
Filing: —
•
Granted: 1953-06-16
•
Expires: 1970-06-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:46
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; G; G06; G06C; G06C7/00; G06C7/02; G06C7/06; G06F; G06F3/00; G06F3/01; G06F3/02; G06F3/0202; H01H13/83; H01H2219/00; H01H2219/054; H01H2219/062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2255909A
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US2174150A
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US2059652A
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US2476257A
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US1084667A
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US1514954A
Cited
US1414978A
Cited
US1554048A
Cited
US1808213A
Cited
US2176640A
Cited
US2234954A
Cited
US2301419A
Cited
US2346988A
Cited
US2493829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |