US3409219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidifier
Assignee: SPRINGAIRE CORP
•
Filing: 1967-02-01
•
Granted: 1968-11-05
•
Expires: 1987-02-01
Abstract
No abstract record available.
Inventors
- 👤 Robert C Behnke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:16
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/008; F24D19/0082
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1589428A
Cited
US1725005A
Cited
US2002273A
Cited
GB497805A
Cited
US2171088A
Cited
US2276135A
Cited
US2557042A
Cited
US2854993A
Cited
US3092708A
Cited
US3314662A
Cited
US3265305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |