US2827128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter with modulated cleaning air supply
Assignee: Individual
•
Filing: 1954-05-07
•
Granted: 1958-03-18
•
Expires: 1974-05-07
Abstract
No abstract record available.
Inventors
- 👤 Company The Morristown Trust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:23
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1947447A
Cited
US1904973A
Cited
US2368787A
Cited
US2451073A
Cited
US2495635A
Cited
US2576656A
Cited
US2559428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |