US2821657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deflecting system
Assignee: AT&T Inc
•
Filing: 1955-05-16
•
Granted: 1958-01-28
•
Expires: 1975-05-16
Abstract
No abstract record available.
Inventors
- 👤 Russell C Newhouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:46
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/60; H03K4/69; H03K4/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2660691A
Cited
US2093157A
Cited
US2314409A
Cited
US2305930A
Cited
US2606304A
Cited
US2731567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |