US3524978A
Expired / Lapsed
US
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Curve-plotting system with interpolation
Assignee: Hitachi Ltd
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Filing: 1967-08-25
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Granted: 1970-08-18
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Expires: 1987-08-25
Abstract
No abstract record available.
Inventors
- 👤 Takeo Miura
- 👤 Junzo Iwata
- 👤 Junji Tsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:02
CPC Classifications
G; G06; G06K; G06K15/00; G06K15/22; G06F; G06F17/00; G06F17/10; G06F17/17; G06G; G06G7/00; G06G7/12; G06G7/30; G06J; G06J1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |