US3515378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gravity-impact system for water distribution in humidifiers
Assignee: Individual
•
Filing: 1968-02-26
•
Granted: 1970-06-02
•
Expires: 1988-02-26
Abstract
No abstract record available.
Inventors
- 👤 Harold Gordon Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:33
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F6/00; F24F6/02; F24F6/04; F24F6/12; F24F6/14; F24F2006/146; Y; Y10; Y10S; Y10S261/00; Y10S261/15; Y10S261/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1520125A
Cited
FR802604A
Cited
US2596782A
Cited
US2530002A
Cited
US3139462A
Cited
US3211380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |