US2480031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rear-projection screen
Assignee: RCA Corp
•
Filing: 1944-12-23
•
Granted: 1949-08-23
•
Expires: 1964-12-23
Abstract
No abstract record available.
Inventors
- 👤 Edward W Kellogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:08
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/62; G03B21/625
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1315964A
Cited
US847854A
Cited
US1491830A
Cited
US1935220A
Cited
US2028496A
Cited
US2064322A
Cited
US2086556A
Cited
US2106623A
Cited
US2044620A
Cited
US2279555A
Cited
US2207835A
Cited
US2200646A
Cited
US2294865A
Cited
US2268351A
Cited
US2271196A
Cited
US2364369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-22 | 1953-02-21 | 1953-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-22 | 1957-02-21 | 1957-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-22 | 1961-02-21 | 1961-08-23 | $7700.00 | Window Closed / Lapsed |