US758303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heater.
Assignee: Individual
•
Filing: 1902-08-15
•
Granted: 1904-04-26
•
Expires: 1922-08-15
Abstract
No abstract record available.
Inventors
- 👤 Ernst Eckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:08
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405
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) | 1907-04-26 | 1907-10-26 | 1908-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1911-04-26 | 1911-10-26 | 1912-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1915-04-26 | 1915-10-26 | 1916-04-26 | $7700.00 | Window Closed / Lapsed |