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US3488106A
Expired / Lapsed
US
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Spatial filtering system for performing differentiation
Assignee: International Business Machines Corp
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Filing: 1966-10-18
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Granted: 1970-01-06
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Expires: 1986-10-18
Abstract
No abstract record available.
Inventors
- 👤 Adolf W Lohmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:40
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/42; G02B27/46; G06; G06E; G06E3/00; G06E3/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3292148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |