US3051820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Room heater
Assignee: McGraw Edison Co
•
Filing: 1958-06-16
•
Granted: 1962-08-28
•
Expires: 1978-06-16
Abstract
No abstract record available.
Inventors
- 👤 Carl V Krichton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:55
CPC Classifications
F; F24; F24C; F24C7/00; F24C7/06; F24C7/062; F24C7/065
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1705812A
Cited
US1908559A
Cited
US1942758A
Cited
US2188122A
Cited
US2410211A
Cited
US2476492A
Cited
US2438861A
Cited
US2433137A
Cited
US2456781A
Cited
US2469234A
Cited
US2445250A
Cited
US2590600A
Cited
US2707745A
Cited
GB745700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |