US2965527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressing of curved laminated glass assemblies
Assignee: PPG Industries Inc
•
Filing: 1955-08-19
•
Granted: 1960-12-20
•
Expires: 1975-08-19
Abstract
No abstract record available.
Inventors
- 👤 John W Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:01
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10807; B32B17/10816; B32B17/10825; B32B17/10834; B32B17/10871; Y; Y10; Y10S; Y10S264/00; Y10S264/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
THE METHOD OF PRESSING A CURVED LAMINATED GLASS ASSEMBLY COMPRISING TWO MATCHED SHEETS OF CURVED GLASS AND A THERMOPLASTIC INTERLAYER TO FORM A BONDED LAMINATED ASSEMBLY, WHICH COMPRISES PLACING THE LAMINATED GLASS ASSEMBLY IN AIR IN A CHAMBER, CLOSING THE CHAMBER, WITHDRAWING AIR FROM THE CHAMBER TO PROVIDE AN EVACUATED CHAMBER, HEATING THE ASSEMBLY IN THE EVACUATED CHAMBER TO AN ELEVATED TEMPERATURE, RELEASNG THE VACUUM WHILE MAINTAINING THE ASSEMBLY AT AN ELEVATED TEMPERATURE, INTRODUCING A GAS INTO THE CHAMBER IN DIRECTCONTACT WITH THE ASSEMBLY AT THE ELEVATED TEMPERATURE TO PROVIDE A SUPERATMOSPHERIC GASEOUS PRESSURE, MAINTAINING THE ASSEMBLY AT AN ELEVATED TEMPERATURE IN THE CHAMBER AT A SUPERATMOSPHERIC GASEOUS PRESSURE ONLY FOR A SUFFICIENT PERIOD OF TIME TO SEAL THE INTERLAYER TO THE GLASS SHEETS SUBSTANTIALLY THROUGHOUT THE ENTIRE AREA OF THE LAMINATED ASSEMBLY, COOLING THE CHAMBER WHILE MAINTAINING THE SUPERATMOSPHERIC GASEOUS PRESSURE UNTIL THE BONDED LAMINATED GLASS ASSEMBLY IS COOLED TO A MAXIMUM TEMPERATURE OF ABOUT 175* F.,RELEASING THE SUPERATMOSPHERIC GASEOUS PRESSURE IN THE CHAMBER, AND REMOVING THE BONDED LAMINATED GLASS ASSEMBLY FROM THE CHAMBER.
Claim 2
Independent Claim
175 words
THE METHOD OF PRESSING A CURVED LAMINATED GLASS ASSEMBLY COMPRISING TWO MATCHED SHEETS OF CURVED GLASS AND A THERMOPLASTIC INTERLAYER TO FORM A BONDED LAMINATED ASSEMBLY, WHICH COMPRISES PLACING THE LAMINATED GLASS ASSEMBLY IN AIR IN A CHAMBER, CLOSING THE CHAMBER, WITHDRAWING AIR FROM THE CHAMBER TO PROVIDE AN EVACUATED CHAMBER, HEATING THE ASSEMBLY IN THE EVACUATED CHAMBER TO AN ELEVATED TEMPERATURE, RELEASNG THE VACUUM WHILE MAINTAINING THE ASSEMBLY AT AN ELEVATED TEMPERATURE, INTRODUCING A GAS INTO THE CHAMBER IN DIRECTCONTACT WITH THE ASSEMBLY AT THE ELEVATED TEMPERATURE TO PROVIDE A SUPERATMOSPHERIC GASEOUS PRESSURE, MAINTAINING THE ASSEMBLY AT AN ELEVATED TEMPERATURE IN THE CHAMBER AT A SUPERATMOSPHERIC GASEOUS PRESSURE ONLY FOR A SUFFICIENT PERIOD OF TIME TO SEAL THE INTERLAYER TO THE GLASS SHEETS SUBSTANTIALLY THROUGHOUT THE ENTIRE AREA OF THE LAMINATED ASSEMBLY, COOLING THE CHAMBER WHILE MAINTAINING THE SUPERATMOSPHERIC GASEOUS PRESSURE UNTIL THE BONDED LAMINATED GLASS ASSEMBLY IS COOLED TO A MAXIMUM TEMPERATURE OF ABOUT 175* F.,RELEASING THE SUPERATMOSPHERIC GASEOUS PRESSURE IN THE CHAMBER, AND REMOVING THE BONDED LAMINATED GLASS ASSEMBLY FROM THE CHAMBER.
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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) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |