US3456927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purging system for humidifier
Assignee: Lau Blower Co
•
Filing: 1968-07-10
•
Granted: 1969-07-22
•
Expires: 1988-07-10
Abstract
No abstract record available.
Inventors
- 👤 Warner W Martin
- 👤 Vyto Matas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:15
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/02; F24F6/06; Y; Y10; Y10S; Y10S261/00; Y10S261/15; Y10S261/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2287147A
Cited
US3189328A
Cited
US3190624A
Cited
US3215416A
Cited
US3315948A
Cited
US3359967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |