US2897481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for reading
Assignee: INTELLIGENT MACHINES RES CORP
•
Filing: 1953-12-17
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Granted: 1959-07-28
•
Expires: 1973-12-17
Abstract
No abstract record available.
Inventors
- 👤 David H Shepard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:50
CPC Classifications
G; G06; G06V; G06V30/00; G06V30/10; G06V30/22; G06V30/224; G06V10/00; G06V10/20; G06V10/40; G06V10/42; G06V10/421; G06V30/19; G06V30/196
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1815996A
Cited
US1870989A
Cited
US2039406A
Cited
US2370160A
Cited
US2624798A
Cited
US2615992A
Cited
US2616983A
Cited
US2663758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |