Patent US2028232A successfully refreshed from Google Patents.
US2028232A
Expired / Lapsed
US
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Submultiple frequency generator
Assignee: —
•
Filing: —
•
Granted: 1936-01-21
•
Expires: 1953-01-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:21
CPC Classifications
H; H03; H03B; H03B19/00; H03B19/06; H03B19/08; H03B19/12; H03B21/00; H03B21/01; H03B5/00; H03B5/30
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) | 1939-01-20 | 1939-07-22 | 1940-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-01-20 | 1943-07-22 | 1944-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-01-20 | 1947-07-22 | 1948-01-21 | $7700.00 | Window Closed / Lapsed |