US3819793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for casting thermoplastic materials,e.g.sulphur and bitumens
Assignee: Individual
•
Filing: 1971-04-08
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Granted: 1974-06-25
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Expires: 1991-04-08
Abstract
Abstract METHOD AND APPARATUS ARE PROVIDED FOR CASTING THERMOPLASTIC MATERIALS, E.G. SULPHUR AND BITUMENS. THERMOPLASTIC MATERIAL IN MOLTEN CONDITION IS DEPOSITED ONTO A RECEIVING SURFACE WHICH IS MAINTAINED SUFFICIENTLY MOISTENED TO PREVENT ADHESION THERETO BUT AT THE SAME TIME AVOIDING SUCH A CONCENTRATION OF WATER WHICH WOULD RESULT IN OCCLUSION IN THE SOLIDIFIED MATERIAL. EXAMPLES OF SUITABLE RECEIVING SURFACES, ARE WETTED ADSORBENT SURFACES SUCH AS UNGLAZED CERAMICS, PAPER, SOFT WOODS AND FABRICS, TEXTURED AND FINELY APERTURED SURFACES E.G. WIRE MESH, AND EXPANDED PLASTICS MATERIALS, INCLUDING EXPANDED REGENERATED CLLULOSE MATERIALS.
Inventors
- 👤 H Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:25
CPC Classifications
B; B29; B29C; B29C39/00; B29C48/00; B29C48/25; B29C48/88; B29C48/911; B29C48/9135; B29C48/9145; B29C48/03; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |