US4307867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molds for slip-casting and similar processes
Assignee: Owens Corning Fiberglas Technology Inc
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Filing: 1980-08-07
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Granted: 1981-12-29
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Expires: 2000-08-07
Abstract
Abstract A mold for slip-casting and the like comprising: a gypsum or other water pervious body having a three-dimensional network of chopped glass fiber filaments having a water wettable surface thereon and in an amount of more than 924 lincal inches of filament per cubic inch of the water pervious body. The preferred mold is a gypsum mold having from 4,621 lineal inches of filament to 46,210 lineal inches of filament per cubic inch of gypsum.
Inventors
- 👤 Richard F. Shannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:23
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/14; B; B28; B28B; B28B1/00; B28B1/26; B28B1/261; B28B1/262; B28B1/264
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
98 words
A new and improved mold for producing ceramic slip cast ware and the like, comprising: a body having a forming surface of desired shape to which a ceramic slip is communicated, said body having pores which strain out ceramic particles of the slip without having the ceramic particles becoming locked therein and while allowing water from the slip to pass therethrough, said body having chopped water wettable spaced apart monofilaments embedded therein for conducting water away from said forming surface, said monofilaments being at a loading of at least approximately 675 inches per cubic inch of solid body.
Claim 2
Dependent Claim
98 words
A new and improved mold for producing ceramic slip cast ware and the like, comprising: a body having a forming surface of desired shape to which a ceramic slip is communicated, said body having pores which strain out ceramic particles of the slip without having the ceramic particles becoming locked therein and while allowing water from the slip to pass therethrough, said body having chopped water wettable spaced apart monofilaments embedded therein for conducting water away from said forming surface, said monofilaments being at a loading of at least approximately 675 inches per cubic inch of solid body.
Claim 3
Dependent Claim
16 words
The new and improved mold of claim 1 wherein the water wettable monofilaments are glass monofilaments.
Claim 4
Dependent Claim
20 words
The new and improved mold of claim 1 wherein said monofilaments are in the form of a three dimensional network.
Claim 5
Dependent Claim
20 words
The new and improved mold of claim 1 wherein said water transfer portion containing the monofilaments consists essentially of gypsum.
Claim 6
Dependent Claim
98 words
A new and improved mold for producing ceramic slip-cast ware and the like comprising: a porous body having a forming surface of desired shape to which a ceramic slip is communicated, said body having pores which strain out particles of the slip without having the ceramic particles becoming locked therein and while allowing water from the slip to pass therethrough, said porous body having a three dimensional network of chopped glass monifilaments spaced apart and embedded therein, said monofilaments being at a loading of at least 3,376 inches per cubic inch of the solids of the porous body.
Claim 7
Dependent Claim
98 words
A new and improved mold for producing ceramic slip-cast ware and the like comprising: a porous body having a forming surface of desired shape to which a ceramic slip is communicated, said body having pores which strain out particles of the slip without having the ceramic particles becoming locked therein and while allowing water from the slip to pass therethrough, said porous body having a three dimensional network of chopped glass monifilaments spaced apart and embedded therein, said monofilaments being at a loading of at least 3,376 inches per cubic inch of the solids of the porous body.
Claim 8
Dependent Claim
15 words
The mold of claim 5 wherein the filaments have a negative zeta potential in water.
Claim 9
Dependent Claim
15 words
The mold of claim 5 wherein the monofilaments have a diameter less than 0.0010 inch.
Claim 10
Dependent Claim
18 words
The mold of claim 7 wherein the monofilaments have a length of more than approximately one eighth inch.
Claim 11
Dependent Claim
14 words
The mold of claim 5 wherein said water transfer portion consists essentially of gypsum.
Claim 12
Dependent Claim
17 words
The mold of claim 9 wherein said network of monofilaments extends between opposite surfaces of the mold.
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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) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |