Patent US2499990A successfully refreshed from Google Patents.
US2499990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric apparatus for simulating radio range signals
Assignee: Individual
•
Filing: 1946-04-10
•
Granted: 1950-03-07
•
Expires: 1966-04-10
Abstract
No abstract record available.
Inventors
- 👤 Dehmel Richard Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:23
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2010833A
Cited
US2165236A
Cited
US2164412A
Cited
US2226726A
Cited
US2199066A
Cited
US2243600A
Cited
US2454503A
Cited
US2312962A
Cited
US2389359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |