Patent US3156535A successfully refreshed from Google Patents.
US3156535A
Expired / Lapsed
US
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Apparatus for production of foamed plastics
Assignee: Individual
•
Filing: 1959-05-15
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Granted: 1964-11-10
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Expires: 1979-05-15
Abstract
No abstract record available.
Inventors
- 👤 Marion W Humphreys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:46
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/74; B29B7/7404; B29B7/7433; Y; Y10; Y10S; Y10S366/00; Y10S366/604
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
APPARATUS FOR PRODUCTION OF FOAMED PLASTIC FROM A MIXTURE OF FLUIDS COMPRISING A MIXING DEVICE FORMED WITH A MIXING CHAMBER, WITH A PLURALITY OF INLET PORTS FOR CONDUCTING THE RESPECTIVE FLUIDS INTO SUCH CHAMBER, AND WITH AN OUTLET FOR DISCHARGE OF THE MIXTURE FROM SUCH CHAMBER, AND A HIGH SPEED ROTARY MEMBER IN SUCH CHAMBER, SUCH INLET PORTS EXTENDING AXIALLY TRANSVERSELY THEREOF AND ARRANGED TO DEPOSIT THIN LAYERS OF THE RESPECTIVE FLUIDS FROM SUCH INLET PORTS SUCCESSIVELY DIRECTLY THEREON FOR INTIMATE MIXING AND TO CONVEY SUCH MIXTURE TO SUCH OUTLET, SAID ROTARY MEMBER HAVING A MAJOR DIAMETER AFFORDING ONLY A SMALL RADIAL CLEARANCE IN SUCH CHAMBER.
Claim 2
Dependent Claim
106 words
APPARATUS FOR PRODUCTION OF FOAMED PLASTIC FROM A MIXTURE OF FLUIDS COMPRISING A MIXING DEVICE FORMED WITH A MIXING CHAMBER, WITH A PLURALITY OF INLET PORTS FOR CONDUCTING THE RESPECTIVE FLUIDS INTO SUCH CHAMBER, AND WITH AN OUTLET FOR DISCHARGE OF THE MIXTURE FROM SUCH CHAMBER, AND A HIGH SPEED ROTARY MEMBER IN SUCH CHAMBER, SUCH INLET PORTS EXTENDING AXIALLY TRANSVERSELY THEREOF AND ARRANGED TO DEPOSIT THIN LAYERS OF THE RESPECTIVE FLUIDS FROM SUCH INLET PORTS SUCCESSIVELY DIRECTLY THEREON FOR INTIMATE MIXING AND TO CONVEY SUCH MIXTURE TO SUCH OUTLET, SAID ROTARY MEMBER HAVING A MAJOR DIAMETER AFFORDING ONLY A SMALL RADIAL CLEARANCE IN SUCH CHAMBER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |