US2562479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Writing aid for the blind
Assignee: Individual
•
Filing: 1949-01-03
•
Granted: 1951-07-31
•
Expires: 1969-01-03
Abstract
No abstract record available.
Inventors
- 👤 Spikes John Curry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:02
CPC Classifications
G; G09; G09B; G09B21/00; G09B21/001; G09B21/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US553504A
Cited
US579183A
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US589955A
Cited
US760211A
Cited
US842144A
Cited
US1019789A
Cited
US1293023A
Cited
US2034350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-30 | 1955-01-29 | 1955-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-30 | 1959-01-29 | 1959-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-30 | 1963-01-29 | 1963-07-31 | $7700.00 | Window Closed / Lapsed |