US2805660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidifier for use with warm air furnaces
Assignee: JET HEET Inc
•
Filing: 1952-12-09
•
Granted: 1957-09-10
•
Expires: 1972-12-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert E Coleman
- 👤 George N Miles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:10
CPC Classifications
F; F24; F24D; F24D5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1721321A
Cited
US1870253A
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US1960545A
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US2131125A
Cited
US2336647A
Cited
US2570451A
Cited
US2613874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |