US2990540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control systems
Assignee: RCA Corp
•
Filing: 1957-07-30
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Granted: 1961-06-27
•
Expires: 1977-07-30
Abstract
No abstract record available.
Inventors
- 👤 Ivan H Sublette
- 👤 Lawrie W Honens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:22
CPC Classifications
G; G11; G11C; G11C7/00; G11C11/00; G11C11/02; G11C11/08
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) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |