US2275355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump and air separator
Assignee: BJOURNULF JOHNSEN
•
Filing: 1938-04-28
•
Granted: 1942-03-03
•
Expires: 1958-04-28
Abstract
No abstract record available.
Inventors
- 👤 Walter S Finken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:24
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/08; B67D7/16; B67D7/22; B67D7/56; B67D7/58; B67D7/62; B67D7/66; B67D7/76; B67D7/763; Y; Y10; Y10S; Y10S494/00; Y10S494/90
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) | 1945-03-02 | 1945-09-01 | 1946-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-03-02 | 1949-09-01 | 1950-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-03-02 | 1953-09-01 | 1954-03-03 | $7700.00 | Window Closed / Lapsed |