Patent US2822800A successfully refreshed from Google Patents.
US2822800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined portable space heater and ventilator
Assignee: International Manufacturing Co
•
Filing: 1954-11-09
•
Granted: 1958-02-11
•
Expires: 1974-11-09
Abstract
No abstract record available.
Inventors
- 👤 Vernon C Hines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:52
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/065
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2193735A
Cited
US1561741A
Cited
DE665164C
Cited
US2156101A
Cited
US2132294A
Cited
US2263732A
Cited
US2383431A
Cited
US2405427A
Cited
US2373900A
Cited
US2684667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |