US2958859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical encoding and decoding switching apparatus
Assignee: International Business Machines Corp
•
Filing: 1955-06-01
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Granted: 1960-11-01
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Expires: 1975-06-01
Abstract
No abstract record available.
Inventors
- 👤 John J Lentz
- 👤 John H Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:38
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/04; G09G3/16; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G06; G06F; G06F3/00; G06F3/06; G09F; G09F9/00; G09F9/30; G09F9/302; G09G3/045; H; H03; H03M; H03M7/00
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) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |