US3294513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for annealing glass
Assignee: Pilkington Group Ltd
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Filing: 1963-04-30
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Granted: 1966-12-27
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Expires: 1983-04-30
Abstract
No abstract record available.
Inventors
- 👤 Beattie John Reginald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:26
CPC Classifications
C; C03; C03B; C03B25/00; C03B25/04; C03B25/06; C03B25/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
APPARATUS INCLUDING AN ANNEALING LEHR HAVING A LOW THERMAL CAPACITY AND ADAPTED FOR CONTROLLING THE RATE OF HEAT LOSS THE GLASS AS IT IS COOLED THROUGH THE ANNEALING RANGE OF THE GLASS, THE LEHR COMPRISING AT LEAST IN THE NEIGHBOURHOOD OF THE ANNEALING ZONE, A CAVITY WALL STRUCTURE OF WHICH EACH WALL CONSISTS OF A PLURALITY OF PARTITIONS EXTENDING ALONG THE WALL FACE TO FACE AND SPACED IN DIRECTIONS TRANSVERSE TO THE WALL, AT LEAST ONE OF THE SPACED PARTITIONS IN EACH WALL OF THE CAVITY WALL STRUCTURE HAVING A COATING OF REFRACTORY MATERIAL BEING SUCH THAT, FLECTING SURFACE, SAID REFRACTORY MATERIAL BEING SUCH THAT, IN THE TEMPERATURE RANGE OF 570*C. TO 480*C. SAID MATERIAL HAS A SURFACE REFLECTIVITY GREATER THAN ITS SURFACE ABSORPTIVITY AT A SUBSTANTIAL PORTION OF WAVELENGTHS BETWEEN 2.5 MICRONS AND 6 MICRONS FOR INHIBITING THE TRANSMITTION OF HEAT THROUGH THE CAVITY WALL STRUCTURE FROM THE INTERIOR OF THE LEHR.
Claim 2
Dependent Claim
153 words
APPARATUS INCLUDING AN ANNEALING LEHR HAVING A LOW THERMAL CAPACITY AND ADAPTED FOR CONTROLLING THE RATE OF HEAT LOSS THE GLASS AS IT IS COOLED THROUGH THE ANNEALING RANGE OF THE GLASS, THE LEHR COMPRISING AT LEAST IN THE NEIGHBOURHOOD OF THE ANNEALING ZONE, A CAVITY WALL STRUCTURE OF WHICH EACH WALL CONSISTS OF A PLURALITY OF PARTITIONS EXTENDING ALONG THE WALL FACE TO FACE AND SPACED IN DIRECTIONS TRANSVERSE TO THE WALL, AT LEAST ONE OF THE SPACED PARTITIONS IN EACH WALL OF THE CAVITY WALL STRUCTURE HAVING A COATING OF REFRACTORY MATERIAL BEING SUCH THAT, FLECTING SURFACE, SAID REFRACTORY MATERIAL BEING SUCH THAT, IN THE TEMPERATURE RANGE OF 570*C. TO 480*C. SAID MATERIAL HAS A SURFACE REFLECTIVITY GREATER THAN ITS SURFACE ABSORPTIVITY AT A SUBSTANTIAL PORTION OF WAVELENGTHS BETWEEN 2.5 MICRONS AND 6 MICRONS FOR INHIBITING THE TRANSMITTION OF HEAT THROUGH THE CAVITY WALL STRUCTURE FROM THE INTERIOR OF THE LEHR.
References Cited (Backward Citations)
CA611594A
Cited
US1571137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |