US2470345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air washer
Assignee: PETERS DALTON Inc
•
Filing: 1943-06-28
•
Granted: 1949-05-17
•
Expires: 1963-06-28
Abstract
No abstract record available.
Inventors
- 👤 Orrin E Fenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:17
CPC Classifications
B; B24; B24B; B24B55/00; B24B55/06; Y; Y10; Y10S; Y10S29/00; Y10S29/079
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US386735A
Cited
US1793620A
Cited
US1528439A
Cited
US2120490A
Cited
US2171574A
Cited
US2191187A
Cited
US2257516A
Cited
GB508831A
Cited
US2316491A
Cited
US2243839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-16 | 1952-11-15 | 1953-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-16 | 1956-11-15 | 1957-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-16 | 1960-11-15 | 1961-05-17 | $7700.00 | Window Closed / Lapsed |