US3682609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlling thickness of newly drawn glass sheet
Assignee: Corning Glass Works
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Filing: 1969-10-06
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Granted: 1972-08-08
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Expires: 1989-10-06
Abstract
Abstract Variation in temperature profile across the width of newly formed glass sheet produces objectionable thickness variations which adversely effect optical quality. Precision control of the temperature profile across the width of newly drawn sheet glass is obtained through the provisions of a plurality of closed spaced, individually regulated fluid control jets or tubes positioned across the width of such sheet within a closure with the exit ends of such tubes being shielded from the glass by means of a wall member having high conductivity, low expansion, and high emissivity.
Inventors
- 👤 Stuart M Dockerty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:34
CPC Classifications
C; C03; C03B; C03B17/00; C03B17/06; C03B17/064; C03B17/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |