Patent US2655595A successfully refreshed from Google Patents.
US2655595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keying system
Assignee: —
•
Filing: —
•
Granted: 1953-10-13
•
Expires: 1970-10-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:05
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/78; H03K3/80; H04; H04B; H04B1/00; H04B1/69; H04B1/7163; H04B1/717; H04B1/7174
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1873786A
Cited
US1913588A
Cited
US1984105A
Cited
US1914407A
Cited
US2076335A
Cited
US2134562A
Cited
US2407272A
Cited
US2416327A
Cited
US2391894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |