US2551740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic computing apparatus
Assignee: BELMONT RADIO Corp
•
Filing: 1946-05-03
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Granted: 1951-05-08
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Expires: 1966-05-03
Abstract
No abstract record available.
Inventors
- 👤 Elmer G Hills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:49
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/32; G06G7/34
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) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |