Patent US6277092B1 successfully refreshed from Google Patents.
US2641044A
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Process for manufacturing mullitecontaining refractories
Assignee: Phillips Petroleum Co
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Filing: 1949-10-24
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Granted: 1953-06-09
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Expires: 1969-10-24
Abstract
No abstract record available.
Inventors
- 👤 Louis C Bearer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:37
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/6325; C04B35/01; C04B35/10; C04B35/101; C04B35/16; C04B35/18; Y; Y10; Y10S; Y10S425/00; Y10S425/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A PROCESS FOR MANUFACTURING GLASS-FREE REFRACTORY ARTICLES CONSISTING ESSENTIALLY OF REFRACTORY MATERIAL BONDED WITH MULLITE, WHICH COMPRISES PREPARING A HOMOGENOUS PLASTIC MIX INCLUDING ALUMINA GRAIN, OTHER REFRACTORY MATERIAL IN THE FORM OF GRAIN, AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF SILICONES AND DERIVATIVES OF SILICONES WHICH ARE CONVERTED TO PURE
Claim 2
Dependent Claim
52 words
A PROCESS FOR MANUFACTURING GLASS-FREE REFRACTORY ARTICLES CONSISTING ESSENTIALLY OF REFRACTORY MATERIAL BONDED WITH MULLITE, WHICH COMPRISES PREPARING A HOMOGENOUS PLASTIC MIX INCLUDING ALUMINA GRAIN, OTHER REFRACTORY MATERIAL IN THE FORM OF GRAIN, AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF SILICONES AND DERIVATIVES OF SILICONES WHICH ARE CONVERTED TO PURE
References Cited (Backward Citations)
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US2362825A
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US2413961A
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US2478757A
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US2460811A
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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) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |