Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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US Patent 4017290 - Method and apparatus for making uniform pellets for fusion reactors
US Patent Issued on April 12, 1977
Estimated Patent Expiration Date:
April 12, 1994Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
April 12, 1994Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA method and apparatus for making uniform pellets for laser driven fusion reactors which comprises selection of a quantity of glass frit which has been accurately classified as to size within a few micrometers and contains an occluded material, such as urea, which gasifies and expands when heated. The sized particles are introduced into an apparatus which includes a heated vertical tube with temperatures ranging from 800° C to 1300° C. The particles are heated during the drop through the tube to molten condition wherein the occluded material gasifies to form hollow microspheres which stabilize in shape and plunge into a collecting liquid at the bottom of the tube. The apparatus includes the vertical heat resistant tube, heaters for the various zones of the tube and means for introducing the frit and collecting the formed microspheres. | InventorsAssigneeApplicationNo. 05/463860 filed on 04/15/1974US Classes:65/21.4, Hollow or porous particle264/15, SPHEROIDIZING OR ROUNDING OF SOLID PARTICLES264/43, Including vitrification or firing264/54, Chemical blowing425/4C, Continuously65/141, MELT DISINTEGRATOR AND SOLIDIFIER INCLUDING FLUID-MELT CONTACT MEANS65/142, PARTICULATE BEAD OR BALL MAKING APPARATUS (E.G., PIN HEADING)65/22With pore forming in situField of Search65/22, With pore forming in situ65/141MELT DISINTEGRATOR AND SOLIDIFIER INCLUDING FLUID-MELT CONTACT MEANSExaminersPrimary: Lindsay, Robert L.Attorney, Agent or FirmUS Patent References2676892, 3171714, 3350213, 3365315 |
