Patent US989900A successfully refreshed from Google Patents.
US989900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical heater.
Assignee: Individual
•
Filing: 1910-02-11
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Granted: 1911-04-18
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Expires: 1930-02-11
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Fey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:20
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/101; F24H1/102; F24H1/103
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) | 1914-04-17 | 1914-10-17 | 1915-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1918-04-17 | 1918-10-17 | 1919-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1922-04-17 | 1922-10-17 | 1923-04-18 | $7700.00 | Window Closed / Lapsed |