Patent US2516922A successfully refreshed from Google Patents.
US3140937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separators
Assignee: Douglas Aircraft Co Inc
•
Filing: 1960-05-24
•
Granted: 1964-07-14
•
Expires: 1980-05-24
Abstract
No abstract record available.
Inventors
- 👤 Bo N Hoffstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:16
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/08; B04C5/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
APPARATUS FOR SEPARATING ENTRAINED PARTICLES FROM A BODY OF FLUID COMPRISING A GRID ASSEMBLY INCLUDING A PLURALITY OF UNIFORMLY SPACED PARALLEL IDENTICAL BARS, MEANS FOR CAUSING SAID FLUID TO PASS IN A PREDETERMINED PATH ALONG ONE SURFACE OF SAID GRID STRUCTURE IN A DIRECTION GENERALLY NORMAL TO THE SAID AXES OF SAID BARS, EACH OF SAID BARS HAVING SIDE WALLS EXTENDING TRANSVERSELY OF SAID PATH AND AN ESSENTIALLY CENTRAL OPENING EXTENDING FROM END TO END THEREOF, SAID OPENINGS COMMUNICATING WITH THE EXTERIOR OF SAID BAR THROUGH A SLOT EXTENDING LONGITUDINALLY OF SAID BAR, SAID BARS HAVING A SMOOTH CONVEX SURFACE PROJECTING OUTWARDLY INTO SAID FLUID PATH, ONE END OF SAID CONVEX SURFACE INTERSECTING ONE SIDE OF SAID SLOT IN A SHARP EDGE, AN ESSENTIALLY FLAT SURFACE LEADING AWAY FROM THE OPPOSITE EDGE OF SAID SLOT AND INTERSECTING ONE OF SAID SIDE WALLS IN A SHARP EDGE EXTENDING LONGITUDINALLY OF SAID BAR, SAID LAST MENTIONED EDGE FORMING THE ENTRANCE TO THE SPACE BETWEEN ADJACENT BARS.
Claim 2
Dependent Claim
164 words
APPARATUS FOR SEPARATING ENTRAINED PARTICLES FROM A BODY OF FLUID COMPRISING A GRID ASSEMBLY INCLUDING A PLURALITY OF UNIFORMLY SPACED PARALLEL IDENTICAL BARS, MEANS FOR CAUSING SAID FLUID TO PASS IN A PREDETERMINED PATH ALONG ONE SURFACE OF SAID GRID STRUCTURE IN A DIRECTION GENERALLY NORMAL TO THE SAID AXES OF SAID BARS, EACH OF SAID BARS HAVING SIDE WALLS EXTENDING TRANSVERSELY OF SAID PATH AND AN ESSENTIALLY CENTRAL OPENING EXTENDING FROM END TO END THEREOF, SAID OPENINGS COMMUNICATING WITH THE EXTERIOR OF SAID BAR THROUGH A SLOT EXTENDING LONGITUDINALLY OF SAID BAR, SAID BARS HAVING A SMOOTH CONVEX SURFACE PROJECTING OUTWARDLY INTO SAID FLUID PATH, ONE END OF SAID CONVEX SURFACE INTERSECTING ONE SIDE OF SAID SLOT IN A SHARP EDGE, AN ESSENTIALLY FLAT SURFACE LEADING AWAY FROM THE OPPOSITE EDGE OF SAID SLOT AND INTERSECTING ONE OF SAID SIDE WALLS IN A SHARP EDGE EXTENDING LONGITUDINALLY OF SAID BAR, SAID LAST MENTIONED EDGE FORMING THE ENTRANCE TO THE SPACE BETWEEN ADJACENT BARS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |