Patent US2106581A successfully refreshed from Google Patents.
Patent US2683437A successfully refreshed from Google Patents.
US2184485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low power heating element
Assignee: ENTPR S ELECTR FRIBOURGEOISES
•
Filing: 1937-03-29
•
Granted: 1939-12-26
•
Expires: 1957-03-29
Abstract
No abstract record available.
Inventors
- 👤 Challet Etienne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:49
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/22; H05B3/28; H05B3/283
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) | 1942-12-25 | 1943-06-26 | 1943-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-12-25 | 1947-06-26 | 1947-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-12-25 | 1951-06-26 | 1951-12-26 | $7700.00 | Window Closed / Lapsed |