Patent US2147471A successfully refreshed from Google Patents.
US2147471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
End cap and hanger for flashlights
Assignee: BLAKE Manufacturing CORP
•
Filing: 1934-11-06
•
Granted: 1939-02-14
•
Expires: 1954-11-06
Abstract
No abstract record available.
Inventors
- 👤 Donald W Tyrrell
- 👤 Wesley J Officer
- 👤 Seaver Blake Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:42
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/08; F21V21/088; F21V21/0885; F21L; F21L4/00; F21L4/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-02-13 | 1942-08-15 | 1943-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-02-13 | 1946-08-15 | 1947-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-02-13 | 1950-08-15 | 1951-02-14 | $7700.00 | Window Closed / Lapsed |