US2592552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical instruction board
Assignee: Individual
•
Filing: 1944-10-04
•
Granted: 1952-04-15
•
Expires: 1964-10-04
Abstract
No abstract record available.
Inventors
- 👤 Florez Luis De
- 👤 David K Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:12
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/06; G09B23/18; G09B23/183; G09B23/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1271641A
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GB123170A
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GB223402A
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US1647276A
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GB344668A
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US1895068A
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US1968039A
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US2140563A
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US2477653A
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US2390706A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |