US1550048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for recording electrical signals
Assignee: Individual
•
Filing: 1922-06-17
•
Granted: 1925-08-18
•
Expires: 1942-06-17
Abstract
No abstract record available.
Inventors
- 👤 Ruben Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:20
CPC Classifications
H; H04; H04L; H04L15/00; H04L15/24; H04L15/28; H04L15/30; B; B43; B43K; B43K29/00; B43K8/00; B43K8/22
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) | 1928-08-17 | 1929-02-16 | 1929-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-08-17 | 1933-02-16 | 1933-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-08-17 | 1937-02-16 | 1937-08-18 | $7700.00 | Window Closed / Lapsed |