US2570329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trouble light with tripod-forming support
Assignee: AMERICAN DISPLAY Co
•
Filing: 1945-05-30
•
Granted: 1951-10-09
•
Expires: 1965-05-30
Abstract
No abstract record available.
Inventors
- 👤 Milton S Dunkelberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:32
CPC Classifications
F; F21; F21L; F21L14/00; F21L14/02; F21V; F21V21/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US504866A
Cited
GB190717067A
Cited
US1205011A
Cited
US1116847A
Cited
US1222573A
Cited
US1157519A
Cited
US1159047A
Cited
GB192449A
Cited
US1719098A
Cited
US1865469A
Cited
FR761866A
Cited
US2225391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |