US2212173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Periodic wave repeater
Assignee: BAE Systems Aerospace Inc
•
Filing: 1938-10-21
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Granted: 1940-08-20
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Expires: 1958-10-21
Abstract
No abstract record available.
Inventors
- 👤 Harold A Wheeler
- 👤 John C Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:19
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/04; H04N5/06; H04N5/067; H04N5/0675; H03; H03B; H03B19/00; H03B19/06; H03B19/08; H03B19/12; H03K; H03K3/00; H03K3/02; H03K3/04; H03K3/16; H04N5/073
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-08-20 | 1944-02-19 | 1944-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-08-20 | 1948-02-19 | 1948-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-08-20 | 1952-02-19 | 1952-08-20 | $7700.00 | Window Closed / Lapsed |