US1397705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable electric lamp
Assignee: DIAMOND ELECTRIC SPECIALTIES C
•
Filing: 1918-01-17
•
Granted: 1921-11-22
•
Expires: 1938-01-17
Abstract
No abstract record available.
Inventors
- 👤 Louis E Shaw
- 👤 Francis M Rosenfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:25
CPC Classifications
F; F21; F21L; F21L4/00
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) | 1924-11-21 | 1925-05-23 | 1925-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-11-21 | 1929-05-23 | 1929-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-11-21 | 1933-05-23 | 1933-11-22 | $7700.00 | Window Closed / Lapsed |