US2448071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orifice exchanger
Assignee: Individual
•
Filing: 1944-08-12
•
Granted: 1948-08-31
•
Expires: 1964-08-12
Abstract
No abstract record available.
Inventors
- 👤 Bert E Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:49
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/40; G01F1/42
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1569305A
Cited
US1808715A
Cited
GB229985A
Cited
US1792950A
Cited
US2079896A
Cited
US2014682A
Cited
DE625282C
Cited
US2000853A
Cited
US2050544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-31 | 1952-03-01 | 1952-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-31 | 1956-03-01 | 1956-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-31 | 1960-03-01 | 1960-08-31 | $7700.00 | Window Closed / Lapsed |