US2777254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated refractory for contacting molten glass and method of making same
Assignee: Owens Corning
•
Filing: 1952-10-22
•
Granted: 1957-01-15
•
Expires: 1972-10-22
Abstract
No abstract record available.
Inventors
- 👤 August C Siefert
- 👤 Robert J Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:57
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/16; C03B5/167; C03B5/1672; C03B5/1675; C03B37/00; C03B37/08; C03B37/095; C03B5/42; C03B5/43
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
88 words
A METHOD OF PRODUCING A REFRACTORY MEMBER CONSISTING ESSENTIALLY OF DEPOSITING UPON A ZIECONIUM SILICATE MEMBER A LAYER COMPRISING ALUMINA, SPREADING OVER SAID LAYER COMPRISING ALUMINA OF FOIL OF PLATINUM, PRESSING SAID FOIL OF PLATINUM AGAINST SAID LAYER COMPRISING ALUMINA AND HEATING THE COMPOSITE PRODUCT TO FROM ABOUT 2500* TO 2800* F., FOR A SUFFICIENT LENGTH OF TIME TO CAUSE THE ALUMINA TO REACT WITH SAID ZIRCONIUM SILICATE GLASS BETWEEN FORM A BOND OF ALUMINUM ZIRCONIUM SILICATE GLASS BETWEEN SAID FOIL OF PLATINUM AND SAID ZIRCONIUM SILICATE MEMBER.
Claim 2
Independent Claim
88 words
A METHOD OF PRODUCING A REFRACTORY MEMBER CONSISTING ESSENTIALLY OF DEPOSITING UPON A ZIECONIUM SILICATE MEMBER A LAYER COMPRISING ALUMINA, SPREADING OVER SAID LAYER COMPRISING ALUMINA OF FOIL OF PLATINUM, PRESSING SAID FOIL OF PLATINUM AGAINST SAID LAYER COMPRISING ALUMINA AND HEATING THE COMPOSITE PRODUCT TO FROM ABOUT 2500* TO 2800* F., FOR A SUFFICIENT LENGTH OF TIME TO CAUSE THE ALUMINA TO REACT WITH SAID ZIRCONIUM SILICATE GLASS BETWEEN FORM A BOND OF ALUMINUM ZIRCONIUM SILICATE GLASS BETWEEN SAID FOIL OF PLATINUM AND SAID ZIRCONIUM SILICATE MEMBER.
Claim 3
Dependent Claim
57 words
IN GLASS HANDLING APPARATUS, A REFRACTORY MEMBER COMPRISING A BLOCK OF ZIRCONIUM SILICATE, OVER AT LEAST ONE, FACE THEREOF A LAYER OF PRECIOUS METAL A REACTION ZIRCONIUM SILICATE AND LAYER OF PRECIOUS METAL A REACTION PRODUCT OF SAID ZIRCONIUM SILICATE AND ALUMINA, SAID REACTION PRODUCT BONDING SAID LAYER OF PRECIOUS METAL TO SAID BLOCK OF ZIRCONIUM SILICATE.
Claim 4
Dependent Claim
57 words
IN GLASS HANDLING APPARATUS, A REFRACTORY MEMBER COMPRISING A BLOCK OF ZIRCONIUM SILICATE, OVER AT LEAST ONE, FACE THEREOF A LAYER OF PRECIOUS METAL A REACTION ZIRCONIUM SILICATE AND LAYER OF PRECIOUS METAL A REACTION PRODUCT OF SAID ZIRCONIUM SILICATE AND ALUMINA, SAID REACTION PRODUCT BONDING SAID LAYER OF PRECIOUS METAL TO SAID BLOCK OF ZIRCONIUM SILICATE.
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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) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |