US3926656A
Expired / Lapsed
US
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Improved flowmolding composition
Assignee: Ceradyne Inc
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Filing: 1974-10-30
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Granted: 1975-12-16
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Expires: 1994-10-30
Abstract
Abstract An improved flowmolding composition is disclosed. The composition includes a granular material, deflocculant, and a 90/10 ratio by weight mixture of a 135*F melting paraffin wax and a 195*F melting microcrystalline wax.
Inventors
- 👤 John Anthony Mangels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:09
CPC Classifications
C; C08; C08L; C08L91/00; C08L91/06; C08L91/08; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/584; C04B35/591; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/34; C08K3/36; C08K5/00; C08K5/04; C08K5/09
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
42 words
AN IMPROVED FLOWMOLDING COMPOSITION WHICH COMPRISES: 65-77% BY VOLUME OF A GRANULAR REFRACTORY MATERIAL; 0.1-1.0% BY VOLUME OF A DEFLOCCULANT; THE REMAINDER OF VOLUME BEING A 90/10 RATIO BY WEIGHT MIXTURE OF A 135*F MELTING PARAFFIN WAX AND A 195*F MICROCRYSTALLINE WAX.
Claim 2
Dependent Claim
42 words
AN IMPROVED FLOWMOLDING COMPOSITION WHICH COMPRISES: 65-77% BY VOLUME OF A GRANULAR REFRACTORY MATERIAL; 0.1-1.0% BY VOLUME OF A DEFLOCCULANT; THE REMAINDER OF VOLUME BEING A 90/10 RATIO BY WEIGHT MIXTURE OF A 135*F MELTING PARAFFIN WAX AND A 195*F MICROCRYSTALLINE WAX.
Claim 3
Dependent Claim
14 words
The molding composition of claim 1 wherein: said granular material is silicon metal powder.
Claim 4
Dependent Claim
16 words
The molding composition of claim 2 wherein: the composition also includes 0.1-2.0% by volume of Fe2O3.
Claim 5
Dependent Claim
12 words
The molding composition of claim 1 wherein: said deflocculant is zinc stearate.
References Cited (Backward Citations)
US3549736A
Cited
US3729329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |