US3517387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Character isolation apparatus
Assignee: International Business Machines Corp
•
Filing: 1966-05-09
•
Granted: 1970-06-23
•
Expires: 1986-05-09
Abstract
No abstract record available.
Inventors
- 👤 Douglas R Andrews
- 👤 Allan J Atrubin
- 👤 Richard J Baumgartner
- 👤 Milton F Bond
- 👤 Kuang-Chi Hu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:16
CPC Classifications
G; G06; G06V; G06V30/00; G06V30/10; G06V30/14; G06V30/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3234513A
Cited
US3234511A
Cited
US3219974A
Cited
US3199080A
Cited
US3164806A
Cited
US3303466A
Cited
US3344399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |