US2161872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical pocket writing and reading lamp
Assignee: Individual
•
Filing: 1937-10-26
•
Granted: 1939-06-13
•
Expires: 1957-10-26
Abstract
No abstract record available.
Inventors
- 👤 Kostal Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:49
CPC Classifications
F; F21; F21S; F21S6/00; F21S6/002; F21S6/003; F21S9/00; F21S9/02; F21V; F21V21/00; F21V21/14; F21V21/32; F21V23/00; F21V23/04; F21W; F21W2131/00; F21W2131/30; F21W2131/3005
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) | 1942-06-12 | 1942-12-12 | 1943-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-06-12 | 1946-12-12 | 1947-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-06-12 | 1950-12-12 | 1951-06-13 | $7700.00 | Window Closed / Lapsed |