Patent US2954427A successfully refreshed from Google Patents.
US2954427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual display system
Assignee: Individual
•
Filing: 1953-05-12
•
Granted: 1960-09-27
•
Expires: 1973-05-12
Abstract
No abstract record available.
Inventors
- 👤 Robert D Covely
- 👤 Ayres Robert
- 👤 Arthur C Stocker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:37
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1988931A
Cited
US2200749A
Cited
US2251984A
Cited
US2330604A
Cited
US2494992A
Cited
US2546510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |