US2948276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal-fired space heater
Assignee: —
•
Filing: —
•
Granted: 1960-08-09
•
Expires: 1977-08-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:21
CPC Classifications
F; F24; F24B; F24B7/00; F24B7/02; F23; F23B; F23B1/00; F23B50/00; F23B50/02; F23B80/00; F23B80/04; F24B1/00; F24B1/02; F24B13/00; F24B5/00; F24B5/02; F24B5/021; F24B5/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB725059A
Cited
US2227689A
Cited
US2394441A
Cited
US2554370A
Cited
US1225280A
Cited
US2031652A
Cited
US2797874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |