US2845057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace-installed humidifier
Assignee: ECONOMATIC PRODUCTS Co
•
Filing: 1954-01-04
•
Granted: 1958-07-29
•
Expires: 1974-01-04
Abstract
No abstract record available.
Inventors
- 👤 Roy P Skerritt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:11
CPC Classifications
F; F24; F24D; F24D5/00; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7339; Y10T137/7355
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1458549A
Cited
US1720241A
Cited
US1817357A
Cited
US1878817A
Cited
US1936895A
Cited
US2049731A
Cited
US2585764A
Cited
US2573158A
Cited
US2565210A
Cited
US2588567A
Cited
US2709427A
Cited
US2678235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |