US2165531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric lantern
Assignee: Burgess Battery Co
•
Filing: 1937-07-01
•
Granted: 1939-07-11
•
Expires: 1957-07-01
Abstract
No abstract record available.
Inventors
- 👤 Arthur B Bertrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:42
CPC Classifications
F; F21; F21L; F21L4/00; F21V; F21V21/00; F21V21/14; F21V21/145; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32008; Y10T403/32032
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) | 1942-07-10 | 1943-01-09 | 1943-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-07-10 | 1947-01-09 | 1947-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-07-10 | 1951-01-09 | 1951-07-11 | $7700.00 | Window Closed / Lapsed |