US3556460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of porous shaped articles from a thermoplastic substance
Assignee: Koehring Co
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Filing: 1968-08-15
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Granted: 1971-01-19
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Expires: 1988-08-15
Abstract
Abstract A pressurized chest, such as a steam chest, for a molding machine comprising a base, preferably formed of aluminum and mounted upon a steel or iron platen, and a cavity-defining mold face, also preferably formed of aluminum and mounted upon the base in chest-enclosing manner, with those interior walls of the chest, not directly contributing to the heating or cooling of the part being molded within the cavity, being coated with a lining of a plastic resin having a low limit of thermal conductivity to accommodate to the heat dissipation problem and to preclude against an excessive heat loss.
Inventors
- 👤 Charles N Premo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:59
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/20; B29C67/205; B29C33/00; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C44/44; B29C44/445; B29C33/56; B29C33/60; B29C33/62; B29C44/3415; B29C44/3426
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A steam chest according to claim 1, wherein the plastic resin is polytetrafluoroethylene.
Claim 2
Dependent Claim
16 words
A steam chest according to claim 1, wherein the mold face and the base are aluminum.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |