US3558415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass window having a compressively stressed outer glass sheet
Assignee: PPG Industries Inc
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Filing: 1969-01-13
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Granted: 1971-01-26
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Expires: 1989-01-13
Abstract
Abstract A LAMINATED SAFETY GLASS WINDOW HAVING AN OUTWARD FACING GLASS PLY CHEMICALLY TEMPERED TO PROVIDE A SURFACE COMPRESSION STRESS ZONE EXTENDING INWARD BETWEEN 50 AND 500 MICRONS IN THE DIRECTION OF THE GLASS SHEET THICKNESS AND AN INWARD FACING GLASS PLY OF CHEMICALLY TEMPERED GLASS HAVING SURFACES PROVIDED WITH COMPRESSION STRESS ZONES EXTENDING INWARD BETWEEN 10 AND 75 MICRONS IN SAID THICKNESS DIRECTION. THE COMPRESSION STRESS ZONE OF THE OUTER GLASS PLY IS THICKER THAN THOSE OF THE INNER GLASS PLY.
Inventors
- 👤 Raymond G Rieser
- 👤 Joseph Chabal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:58
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10082; B32B17/10091; B32B17/10128; B32B17/10137; B32B17/1055; B32B17/10688; B32B17/10761; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/31; Y10T428/315; Y10T428/31504; Y10T428/31551; Y10T428/31627; Y10T428/3163
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |