US2809290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Function generator
Assignee: Vitro Corp of America
•
Filing: 1953-06-26
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Granted: 1957-10-08
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Expires: 1973-06-26
Abstract
No abstract record available.
Inventors
- 👤 Kee Joseph Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:17
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/14; G06G7/16; G06G7/163
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) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |