US2929921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Code controlled communication system
Assignee: General Electric Co
•
Filing: 1955-01-26
•
Granted: 1960-03-22
•
Expires: 1975-01-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Welmon D Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:27
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02; H04W88/022; H04W88/025; H04W88/027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2141551A
Cited
US2325829A
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US2486154A
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US2499234A
Cited
US2523315A
Cited
US2630525A
Cited
US2724049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |