US2474472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Domestic electric heater
Assignee: Individual
•
Filing: 1945-03-20
•
Granted: 1949-06-28
•
Expires: 1965-03-20
Abstract
No abstract record available.
Inventors
- 👤 Charles C Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:38
CPC Classifications
F; F24; F24C; F24C7/00; F24C7/002; F24C7/004
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1254790A
Cited
US1655987A
Cited
US1672724A
Cited
US1719266A
Cited
GB366759A
Cited
US2329592A
Cited
US2316563A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-27 | 1952-12-27 | 1953-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-27 | 1956-12-27 | 1957-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-27 | 1960-12-27 | 1961-06-28 | $7700.00 | Window Closed / Lapsed |