US2649790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual control board
Assignee: TRENDICATOR SYSTEMS CO
•
Filing: 1948-06-19
•
Granted: 1953-08-25
•
Expires: 1968-06-19
Abstract
No abstract record available.
Inventors
- 👤 Claude W Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:07
CPC Classifications
B; B42; B42F; B42F17/00; B42F17/32; G; G09; G09D; G09D1/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB190103974A
Cited
US1205401A
Cited
US1497923A
Cited
US1711981A
Cited
US1740978A
Cited
US1960313A
Cited
US1860763A
Cited
US2118675A
Cited
US1977667A
Cited
US2042361A
Cited
US2068226A
Cited
FR863509A
Cited
US2234249A
Cited
US2385347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |