US1483379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filtering and cleaning device
Assignee: WILLIAM REED ENGINEERING Co
•
Filing: 1923-05-15
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Granted: 1924-02-12
•
Expires: 1943-05-15
Abstract
No abstract record available.
Inventors
- 👤 William M Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:46
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; Y; Y10; Y10S; Y10S55/00; Y10S55/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1927-02-11 | 1927-08-13 | 1928-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-02-11 | 1931-08-13 | 1932-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-02-11 | 1935-08-13 | 1936-02-12 | $7700.00 | Window Closed / Lapsed |