US2228680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosionproof hand lamp
Assignee: Appleton Electric LLC
•
Filing: 1938-08-27
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Granted: 1941-01-14
•
Expires: 1958-08-27
Abstract
No abstract record available.
Inventors
- 👤 Nils A Tornblom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:11
CPC Classifications
F; F21; F21V; F21V25/00; F21V25/12; F21L; F21L14/00; F21L14/02; F21L14/026
Claims Analysis
Total Claims: 0
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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) | 1944-01-14 | 1944-07-15 | 1945-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-14 | 1948-07-15 | 1949-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-14 | 1952-07-15 | 1953-01-14 | $7700.00 | Window Closed / Lapsed |