US2521787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Computing system
Assignee: RCA Corp
•
Filing: 1944-03-30
•
Granted: 1950-09-12
•
Expires: 1964-03-30
Abstract
No abstract record available.
Inventors
- 👤 Igor E Grosdoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:02
CPC Classifications
H; H03; H03K; H03K23/00; H03K23/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB355705A
Cited
US2158285A
Cited
US2272070A
Cited
US2306386A
Cited
US2405664A
Cited
US2422698A
Cited
US2410156A
Cited
US2404047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |