US2016033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter
Assignee: UNIVERSAL AIR FILTER Corp
•
Filing: 1932-10-17
•
Granted: 1935-10-01
•
Expires: 1952-10-17
Abstract
No abstract record available.
Inventors
- 👤 Christofferson Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:46
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0002; B01D46/0005; B01D46/10; B01D46/12; B01D46/121; B01D46/24; B01D46/2403; B01D46/42; B01D46/4227; B01D46/56; B01D46/58; B01D2271/00; B01D2271/02
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) | 1938-09-30 | 1939-04-01 | 1939-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-09-30 | 1943-04-01 | 1943-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-09-30 | 1947-04-01 | 1947-10-01 | $7700.00 | Window Closed / Lapsed |