US2521635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image retaining system
Assignee: Brush Development Co
•
Filing: 1945-11-08
•
Granted: 1950-09-05
•
Expires: 1965-11-08
Abstract
No abstract record available.
Inventors
- 👤 Kornei Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:50
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1865428A
Cited
US1738464A
Cited
US2006812A
Cited
US1985683A
Cited
US1894637A
Cited
US2124404A
Cited
US2378388A
Cited
US2389991A
Cited
US2426752A
Cited
US2422295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |