US2609433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perforating recorder signaling device
Assignee: AT&T Inc
•
Filing: 1947-05-28
•
Granted: 1952-09-02
•
Expires: 1967-05-28
Abstract
No abstract record available.
Inventors
- 👤 Harold W Goff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:24
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/08; G06F11/085; G06K; G06K5/00; G06K5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1972985A
Cited
US1983388A
Cited
US2165302A
Cited
US2293708A
Cited
US2366434A
Cited
US2442491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |