US2504354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase controlled multivibrator
Assignee: AT&T Inc
•
Filing: 1947-12-24
•
Granted: 1950-04-18
•
Expires: 1967-12-24
Abstract
No abstract record available.
Inventors
- 👤 Erwin M Roschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:50
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/06; H04J3/0602; H04J3/0617; H03; H03B; H03B19/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2406760A
Cited
US2426454A
Cited
US2384379A
Cited
US2405930A
Cited
US2423466A
Cited
US2435207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |