US2748947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter by-pass control
Assignee: AV Roe Canada Ltd
•
Filing: 1951-11-10
•
Granted: 1956-06-05
•
Expires: 1971-11-10
Abstract
No abstract record available.
Inventors
- 👤 Jay Kenneth William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:37
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/147; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7925
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US989533A
Cited
US1128077A
Cited
US1613467A
Cited
US1822006A
Cited
US1955903A
Cited
US2056756A
Cited
US2544269A
Cited
US2544244A
Cited
US2602547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |