Patent US1819172A successfully refreshed from Google Patents.
Patent US2674916A successfully refreshed from Google Patents.
US2674916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable quantity evaluator having light sensing means
Assignee: RCA Corp
•
Filing: 1950-07-26
•
Granted: 1954-04-13
•
Expires: 1970-07-26
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:18
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/08; G01R29/0864; G01R29/0892
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2098326A
Cited
US2213534A
Cited
US2201978A
Cited
US2262354A
Cited
US2209220A
Cited
US2312182A
Cited
US2259287A
Cited
US2298407A
Cited
US2356567A
Cited
US2415591A
Cited
US2386320A
Cited
US2474192A
Cited
US2455532A
Cited
US2510347A
Cited
US2467812A
Cited
US2532964A
Cited
US2494441A
Cited
US2548590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |