Patent US6702826B2 successfully refreshed from Google Patents.
Patent US2530486A successfully refreshed from Google Patents.
US2530486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forced flow portable air heater for mounting upon the exterior walls of rooms to be heated
Assignee: Individual
•
Filing: 1948-04-06
•
Granted: 1950-11-21
•
Expires: 1968-04-06
Abstract
No abstract record available.
Inventors
- 👤 Alwood H Steinmetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:13
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/0025; B60H1/00264
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |