Patent US3692089A successfully refreshed from Google Patents.
US3692089A
Expired / Lapsed
US
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Process for controlling orifice size when extruding molten materials
Assignee: Monsanto Co
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Filing: 1970-12-03
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Granted: 1972-09-19
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Expires: 1990-12-03
Abstract
Abstract The size of the orifice in a process for extruding low viscosity melts is controlled by maintaining at a predetermined level the partial pressure of a gas which enters into chemical reaction with the molten material contained within the crucible assembly, the materials comprising the crucible assembly, and the impurities contained in the melt.
Inventors
- 👤 Wilbur Privott Jr
- 👤 Michael R Sargent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:49
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/005
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
17 words
The improvement of claim 1 wherein carbon monoxide is purged with an inert gas to maintain equilibrium.
Claim 2
Dependent Claim
12 words
The improvement of claim 1 wherein the refractory metal oxide is beryllia.
Claim 3
Dependent Claim
12 words
The improvement of claim 1 wherein the refractory metal oxide is alumina.
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |