US2999639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analog multiplying circuits
Assignee: Unisys Corp
•
Filing: 1957-11-19
•
Granted: 1961-09-12
•
Expires: 1977-11-19
Abstract
No abstract record available.
Inventors
- 👤 Daniel M Lipkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:46
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/16; G06G7/164; G06G7/163
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2587193A
Cited
US2808988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |