US3847582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of continuous fabrication of glass-crystalline materials with rib configuration
Assignee: Individual
•
Filing: 1971-11-02
•
Granted: 1974-11-12
•
Expires: 1991-11-02
Abstract
Abstract Continuous fabrication of sheet glass-crystalline material in which a glass melt is formed into a strip whose lower surface is covered with intersecting ribs forming a square-faced polycaisson structure with the rib height and width not in excess of 2 mm and with the spacings between two adjacent ribs amounting to at least 5 mm. The formed strip undergoes a heat-treating operation, assuring the crystallizing and subsequent tempering of the strip travelling over the lehr conveying rollers.
Inventors
- 👤 M Kozmin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:30
CPC Classifications
C; C03; C03B; C03B13/00; C03B13/08; C03B32/00; C03B32/02; C03C; C03C10/00; C03C10/0036; C03C10/0063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A METHOD FOR THE CONTINUOUS FABRICATION OF GLASSCRYSTALLINE MATERIAL COMPRISING: MELTING A CAO-AL2O3-SIO2 SYSTEM CHARGE SUITABLE FOR THE MANUFACTURE OF GLASS-CRYSTALLINE MATERIAL; FORMING THE GLASS MATERIAL OBTAINED FROM THE MELTED CHARGE INTO STRIP; PRODUCING IN THE COURSE OF FORMING, A PATTERN OF INTERSECTING RIBS ON THE LOWER SURFACE OF THE STRIP WITH THE RIBS FORMING ON THE SAID SURFACE A SQUARE-FACED POLYCAISSON STRUCTURE; CRYSTALLINE THE FORMED STRIP IN A LEHR BY HEATING THE STRIP TO A TEMPERATURE OF 900*-980* WHILE THE SAID STRIP IS ADVANCED ON A CONVEYING ROLLER THROUGH THE LEHR, TEMPERING THE CRYSTALLINED STRIP; SAID RIBS BEING FORMED WITH TRAPEZOIDAL SHAPE IN CROSS-SECTION, NOT MORE THAN 2 MM IN DEPTH AND WIDTH AND SPACED AT A DISTANCE OF AT LEAST 5 MM BETWEEN TWO ADJACENT RIBS BY VIRTUE OF WHICH THE RIBS ACQUIRE MECHANICAL STRENGTH MORE RAPIDLY IN THE COURSE OF CRYSTALLIZATION THAN THE REMAINING GLASS MATERIAL WHILE THE POLYCAISSON STRUCTURE FORMED BY THE RIBS ON THE LOWER SURFACE OF THE STRIP TENDS TO IMPART A DEGREE OF RIGIDITY TO THE LATTER.
Claim 2
Independent Claim
174 words
A METHOD FOR THE CONTINUOUS FABRICATION OF GLASSCRYSTALLINE MATERIAL COMPRISING: MELTING A CAO-AL2O3-SIO2 SYSTEM CHARGE SUITABLE FOR THE MANUFACTURE OF GLASS-CRYSTALLINE MATERIAL; FORMING THE GLASS MATERIAL OBTAINED FROM THE MELTED CHARGE INTO STRIP; PRODUCING IN THE COURSE OF FORMING, A PATTERN OF INTERSECTING RIBS ON THE LOWER SURFACE OF THE STRIP WITH THE RIBS FORMING ON THE SAID SURFACE A SQUARE-FACED POLYCAISSON STRUCTURE; CRYSTALLINE THE FORMED STRIP IN A LEHR BY HEATING THE STRIP TO A TEMPERATURE OF 900*-980* WHILE THE SAID STRIP IS ADVANCED ON A CONVEYING ROLLER THROUGH THE LEHR, TEMPERING THE CRYSTALLINED STRIP; SAID RIBS BEING FORMED WITH TRAPEZOIDAL SHAPE IN CROSS-SECTION, NOT MORE THAN 2 MM IN DEPTH AND WIDTH AND SPACED AT A DISTANCE OF AT LEAST 5 MM BETWEEN TWO ADJACENT RIBS BY VIRTUE OF WHICH THE RIBS ACQUIRE MECHANICAL STRENGTH MORE RAPIDLY IN THE COURSE OF CRYSTALLIZATION THAN THE REMAINING GLASS MATERIAL WHILE THE POLYCAISSON STRUCTURE FORMED BY THE RIBS ON THE LOWER SURFACE OF THE STRIP TENDS TO IMPART A DEGREE OF RIGIDITY TO THE LATTER.
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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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |