US2090469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic continuous blow-down
Assignee: ChampionX LLC
•
Filing: 1934-03-22
•
Granted: 1937-08-17
•
Expires: 1954-03-22
Abstract
No abstract record available.
Inventors
- 👤 Raymond W Chorley
- 👤 Thomas W Demarest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:32
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/48; F22B37/54; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2567; Y10T137/2931; Y10T137/3003; Y10T137/3102; Y10T137/3105; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7846; Y10T137/8593; Y10T137/87571; Y10T137/87676; Y10T137/87684
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1940-08-16 | 1941-02-15 | 1941-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-08-16 | 1945-02-15 | 1945-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-08-16 | 1949-02-15 | 1949-08-17 | $7700.00 | Window Closed / Lapsed |