Patent US1343306A successfully refreshed from Google Patents.
US1343306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duplex translating-circtjits
Assignee: —
•
Filing: —
•
Granted: 1920-06-15
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Expires: 1937-06-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:21
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/46; H03F3/48; H03C; H03C1/00; H03C1/52; H03D; H03D7/00; H03D7/14; H03D7/1416
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) | 1923-06-15 | 1923-12-15 | 1924-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-06-15 | 1927-12-15 | 1928-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-06-15 | 1931-12-15 | 1932-06-15 | $7700.00 | Window Closed / Lapsed |