Patent US2006226A successfully refreshed from Google Patents.
US2153178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and means for signaling
Assignee: International Business Machines Corp
•
Filing: 1934-12-07
•
Granted: 1939-04-04
•
Expires: 1954-12-07
Abstract
No abstract record available.
Inventors
- 👤 Clyde J Fitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:14
CPC Classifications
H; H04; H04L; H04L5/00; H04L5/22; H04L5/24; H04L5/245; H03; H03H; H03H11/00; H03H11/02; H03H11/16; H03H11/22; H03K; H03K5/00; H03K5/153; H03K5/1536; H04J; H04J3/00; H04J3/02; H04J3/04; H04J3/042; H04L13/00; H04L13/02; H04L13/10; H04L13/12; H04L13/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1942-04-03 | 1942-10-03 | 1943-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-03 | 1946-10-03 | 1947-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-03 | 1950-10-03 | 1951-04-04 | $7700.00 | Window Closed / Lapsed |