US2500630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the reading of facsimile and printed matter by the blind
Assignee: Individual
•
Filing: 1947-09-15
•
Granted: 1950-03-14
•
Expires: 1967-09-15
Abstract
No abstract record available.
Inventors
- 👤 Edwin L Davis
- 👤 Jr Olar T Hinton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:22
CPC Classifications
G; G09; G09B; G09B21/00; G09B21/001; G09B21/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2006890A
Cited
US2002352A
Cited
US2063184A
Cited
US2034803A
Cited
US2124673A
Cited
US2054216A
Cited
US2228782A
Cited
US2432123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |