US3701644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for shaping glass sheets with opposed roller sets
Assignee: PPG Industries Inc
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Filing: 1971-11-03
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Granted: 1972-10-31
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Expires: 1991-11-03
Abstract
Abstract SHAPING A SUCCESSION OF CONTINUOUSLY MOVING DISCRETE, HEAT-SOFTENED GLASS SHEETS BY MOMENTARILY ENGAGING THE OPPOSITE SURFACES OF EACH SHEET IN SUCCESSION AT LONGITUDINALLY SPACED LONGITUDINAL INCREMENTS BETWEEN OPPOSED ROLLS OF COMPLEMENTARY SHAPE AS EACH SHEET MOVES CONTINUOUSLY THROUGH A PRESS BENDING STATION AND DISENGAGING THE SHEETS AFTER MOMENTARY PRESSURIZED ENGAGEMENT AFTER THE SHEET HAS BEEN SHAPED BUT BEFORE ANY LONGITUDINALLY SPACED INCREMENT IS SUBJECTED TO PRESSURIZED ENGAGEMENT BETWEEN MORE THAN TWO PAIRS OF ADJACENT ROLLS.
Inventors
- 👤 Robert G Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:59
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/02; C03B23/023; C03B23/03; C03B23/0302; C03B23/033
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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |