US2787997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil-burning room heater
Assignee: Individual
•
Filing: 1955-03-09
•
Granted: 1957-04-09
•
Expires: 1975-03-09
Abstract
No abstract record available.
Inventors
- 👤 Charles T Asbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:47
CPC Classifications
F; F24; F24C; F24C5/00; F24C5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US358432A
Cited
US525399A
Cited
US1488195A
Cited
US1977672A
Cited
US2052643A
Cited
US2278683A
Cited
US2462395A
Cited
US2612890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |