US3493735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Computer circuits for processing trigonometric data
Assignee: NAI Technologies Inc
•
Filing: 1964-03-20
•
Granted: 1970-02-03
•
Expires: 1984-03-20
Abstract
No abstract record available.
Inventors
- 👤 John B Heaviside
- 👤 Franklin W Smith Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:57
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/22; H; H03; H03M; H03M1/00; H03M1/12; H03M1/48; H03M1/485
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |