US3509533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital-analog optical character recognition
Assignee: Recognition Equipment Inc
•
Filing: 1965-06-07
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Granted: 1970-04-28
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Expires: 1985-06-07
Abstract
No abstract record available.
Inventors
- 👤 Albert H Bieser
- 👤 Leonard J Nunley
- 👤 Israel Sheinberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
G; G06; G06V; G06V10/00; G06V10/10; G06V10/20; G06V10/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3069079A
Cited
US3140466A
Cited
US3104369A
Cited
US3104372A
Cited
US3104371A
Cited
US3201751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-27 | 1973-10-27 | 1974-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-27 | 1977-10-27 | 1978-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-27 | 1981-10-27 | 1982-04-28 | $7700.00 | Window Closed / Lapsed |