US2946043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A.c. coding systems for multiple load selection
Assignee: AT&T Inc
•
Filing: 1953-12-16
•
Granted: 1960-07-19
•
Expires: 1973-12-16
Abstract
No abstract record available.
Inventors
- 👤 Willard A Reenstra
- 👤 Wesson J Ritchie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:29
CPC Classifications
H; H03; H03M; H03M5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2424585A
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US2364771A
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US2633557A
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US2760132A
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US2570716A
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GB667630A
Cited
US2614167A
Cited
US2686299A
Cited
US2657272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |