US3472496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forced air furnace humidifier
Assignee: Berns Air King Corp
•
Filing: 1966-02-01
•
Granted: 1969-10-14
•
Expires: 1986-02-01
Abstract
No abstract record available.
Inventors
- 👤 George Coleman
- 👤 James A Swimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:19
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/02; F24F6/06; F24D; F24D5/00; Y; Y10; Y10S; Y10S261/00; Y10S261/15
Claims Analysis
Total Claims: 0
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US3352297A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |