US2848608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic ring circuit
Assignee: International Business Machines Corp
•
Filing: 1954-12-08
•
Granted: 1958-08-19
•
Expires: 1974-12-08
Abstract
No abstract record available.
Inventors
- 👤 Raymond E Nienburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:03
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/54; H03K5/00; H03K5/15; H03K5/15013; H03K5/1506; H03K5/15093
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2552781A
Cited
US2551119A
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US2782307A
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US2662983A
Cited
US2685039A
Cited
US2682615A
Cited
US2691073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |