Patent US2514463A successfully refreshed from Google Patents.
Patent US3891735A successfully refreshed from Google Patents.
US3891735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered artefacts and the like
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1972-12-27
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Granted: 1975-06-24
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Expires: 1992-12-27
Abstract
Abstract A fired refractory artefact with a fine matrix of apertures is manufactured by stacking layers of low ash paper with intervening layers of composite plastics material in sheets. The composite plastics material comprises powdered refractory material and a binder. The composite plastics material sheets are connected by ribs or walls of the composite plastics material formed, for example, in slots cut in the paper layers. The plastics material is cured and the artefact fired after burning off the paper.
Inventors
- 👤 John Malcolm North
- 👤 Ronald Spencer Wilks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:21
CPC Classifications
B; B32; B32B; B32B29/00; B32B29/002; B32B29/005; C; C04; C04B; C04B33/00; C04B33/32; B32B3/00; B32B3/26; B32B3/266; C04B35/00; C04B35/515; C04B35/58; C04B35/584; C04B35/591; C04B35/622; C04B35/64; C04B38/00; C04B38/06; C04B38/0695; Y; Y10; Y10S; Y10S264/00; Y10S264/44
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
179 words
IN A METHOD OF MANUFACTURING A SINTERED ARTEFACT OR LIKE ARTEFACT THE MANUFACTURE OF WHICH INVOLVES FIRING A REFRACTORY MATERIAL, WHICH METHOD COMPRISES STACKING LAYERS OF SHEET MATERIAL CAPABLE OF BURING READILY AND WITHOUT DELETERIOUS ASH FORMATION, WITH INTERVENING LAYERS OF COMPOSITE PLASTICS MATERIAL IN PERFORMED SHEETS COMPRISING POWDERED REFRACTORY MATERIAL AND A BINDER WHICH PROVIDES THERMOSETTING PROPERTIES, PROVIDING RIBS OR WALLS OF COMPOSITE PLASTICS MATERIAL AND EFFECTING BONDING SUCH THAT THE RIBS OR WALLS CONNECT TOGETHER THE SHEETS OF COMPOSITE PLASTICS MATERIAL, THE THICKNESS OF THE LAYERS OF BURNABLE MATERIAL DEFINING THE SEPARATION BETWEEN ADJACENT SHEETS OF COMPOSITE PLASTIC MATERIAL, HEATING THE STACK TO CURE THE BINDER, FURTHER HEATING TO BURN OFF THE BURNABLE MATERIAL, AND FIRING THE STACK TO FORM THE SINTERED OR LIKE ARTEFACT FROM THE POWDER REFRACTORY MATERIAL, A METHOD OF FABRICATING A SHEET COMPONENT COMPRISING SECURING A SHEET OF SAID READILY BURNABLE MATERIAL TO A SUPPORT SHEET WITH ADHESIVE, FORMING SAID ADHESIVELY SECURED READILY BURNABLE SHEET AND SUPPORT SHEET WITH SLOTS CORRESPONDING TO WANTED STRUCTURAL FEATURES IN A FINISHED ARETFACT, SECURING A FURTHER SUPPORT
Claim 2
Dependent Claim
179 words
IN A METHOD OF MANUFACTURING A SINTERED ARTEFACT OR LIKE ARTEFACT THE MANUFACTURE OF WHICH INVOLVES FIRING A REFRACTORY MATERIAL, WHICH METHOD COMPRISES STACKING LAYERS OF SHEET MATERIAL CAPABLE OF BURING READILY AND WITHOUT DELETERIOUS ASH FORMATION, WITH INTERVENING LAYERS OF COMPOSITE PLASTICS MATERIAL IN PERFORMED SHEETS COMPRISING POWDERED REFRACTORY MATERIAL AND A BINDER WHICH PROVIDES THERMOSETTING PROPERTIES, PROVIDING RIBS OR WALLS OF COMPOSITE PLASTICS MATERIAL AND EFFECTING BONDING SUCH THAT THE RIBS OR WALLS CONNECT TOGETHER THE SHEETS OF COMPOSITE PLASTICS MATERIAL, THE THICKNESS OF THE LAYERS OF BURNABLE MATERIAL DEFINING THE SEPARATION BETWEEN ADJACENT SHEETS OF COMPOSITE PLASTIC MATERIAL, HEATING THE STACK TO CURE THE BINDER, FURTHER HEATING TO BURN OFF THE BURNABLE MATERIAL, AND FIRING THE STACK TO FORM THE SINTERED OR LIKE ARTEFACT FROM THE POWDER REFRACTORY MATERIAL, A METHOD OF FABRICATING A SHEET COMPONENT COMPRISING SECURING A SHEET OF SAID READILY BURNABLE MATERIAL TO A SUPPORT SHEET WITH ADHESIVE, FORMING SAID ADHESIVELY SECURED READILY BURNABLE SHEET AND SUPPORT SHEET WITH SLOTS CORRESPONDING TO WANTED STRUCTURAL FEATURES IN A FINISHED ARETFACT, SECURING A FURTHER SUPPORT
Claim 3
Dependent Claim
36 words
A method as claimed in claim 1 wherein the troughs are filled with the mixture of powdered refractory material, binder and solvent by passing the composite of sheets through the mixture and under a doctor blade.
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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |