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US3638673A Expired / Lapsed US ⏱️ 0.0 years remaining

Wax-conditioning apparatus

Assignee: Lampcraft Tool and Mold Inc
•
Filing: 1969-12-23
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Granted: 1972-02-01
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Expires: 1989-12-23
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Abstract

Abstract A wax-melting and conditioning device comprises an airtight tank of material providing fast heat transfer, heating means for the tank, inwardly extending fins to increase the heat transfer to the wax, outwardly extending fins, if necessary, to cool the wax quickly to suitable injection temperature, means for agitating the wax in the tank and a vacuum pump for deaerating the wax during the melting and curing period. The tank is also equipped with at least one heated flexible hose for direct connection to a hot wax reservoir of a wax-injection machine equipped to transfer the wax from the melting tank to the injection machine reservoir free of air by moving a piston in the reservoir in a manner to suck wax over from the tank.

Inventors

  • 👤 Virgil V Stanciu

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 16:00
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/24; B29C67/241; B29B; B29B13/00; B29B13/02; B29B13/022; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3109; Y10T137/6416

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

US3123342A Cited
US2626786A Cited
US2548340A Cited
US2666949A Cited
US3253303A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-01-31 1975-08-02 1976-02-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-01-31 1979-08-02 1980-02-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-01-31 1983-08-02 1984-02-01 $7700.00 Window Closed / Lapsed

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