Patent US20080004707A1 successfully refreshed from Google Patents.
US3405392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic calculators
Assignee: Unisys Corp
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Filing: 1965-04-30
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Granted: 1968-10-08
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Expires: 1985-04-30
Abstract
No abstract record available.
Inventors
- 👤 James F Milne
- 👤 Zur Shimshon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:24
CPC Classifications
G; G06; G06K; G06K15/00; G06K15/02; G06K15/10; G06F; G06F15/00; G06F15/02; G06F3/00; G06F3/01; G06F3/02; G06F3/0227; G06F3/023; G06F3/027
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) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |