US1598097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter
Assignee: Individual
•
Filing: 1925-07-27
•
Granted: 1926-08-31
•
Expires: 1945-07-27
Abstract
No abstract record available.
Inventors
- 👤 Mathis Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:08
CPC Classifications
F; F16; F16B; F16B5/00; F16B5/10; B; B01; B01D; B01D46/00; B01D46/10; Y; Y10; Y10S; Y10S55/00; Y10S55/24; Y10S55/31
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) | 1929-08-30 | 1930-03-01 | 1930-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-08-30 | 1934-03-01 | 1934-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-08-30 | 1938-03-01 | 1938-08-31 | $7700.00 | Window Closed / Lapsed |