US2617535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter unit
Assignee: United Aircraft Products Inc
•
Filing: 1948-11-05
•
Granted: 1952-11-11
•
Expires: 1968-11-05
Abstract
No abstract record available.
Inventors
- 👤 Miles H Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:53
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D25/00; B01D25/12; B01D25/19; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D35/147; Y; Y10; Y10T; Y10T137/00; Y10T137/794; Y10T137/7976
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |