US2665387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ray directing device
Assignee: BARTOW BEACONS Inc
•
Filing: 1950-12-14
•
Granted: 1954-01-05
•
Expires: 1970-12-14
Abstract
No abstract record available.
Inventors
- 👤 John B Bartow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:34
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/02; G21K1/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1465340A
Cited
US1476048A
Cited
US2139966A
Cited
US2067589A
Cited
US2133385A
Cited
US2522522A
Cited
US2542196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |