Patent USRE28090E successfully refreshed from Google Patents.
USRE28090E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffuser by
Assignee: —
•
Filing: 1972-01-31
•
Granted: 1974-07-30
•
Expires: 1992-01-31
Abstract
Abstract AN IMPROVED DIFFUSER FOR CONVERTING FLUID MOMENTUM INTO STATIC PRESSURE. TYPICALLY, A GENERALLY CONICAL DIFFUSER IS PROVIDED WITH ONE OR MORE SPACED INTERMEDIATE APPROXIMATELY CYLINDRICAL RECOVERY SECTIONS. THIS MULTISTAGE DIFFUSER IS CAPABLE OF IMPROVED MOMENTUM CONVERSION EFFICIENCY.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:25
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/44; F04F5/46
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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |