US3074841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of laminating polyvinyl resin sheets
Assignee: PPG Industries Inc
•
Filing: 1955-03-24
•
Granted: 1963-01-22
•
Expires: 1975-03-24
Abstract
No abstract record available.
Inventors
- 👤 Murray A King
- 👤 Brook J Dennison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:42
CPC Classifications
B; B32; B32B; B32B27/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31859; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE METHOD OF BONDING A SHEET OF SYNTHETIC ORGANIC RESIN COMPRISING A COPOLYMER OF AN ETHYLENICALLY UNSATURATED POLYMERIZABLE COMPOUND AND AN UNSATURATED POLYESTER OF A POLYHYDRIC ACOHOL AND A POLYBASIC ACID TO A SHEET OF POLYVINYL ACETAL WHICH COMPRISES APPLYING TO A SURFACE OF SAID SHEET OF SYNTHETIC ORGANIC RESIN A COATING OF A COMPOSITION CONTAINING A POLYVALENT METAL SALT AND A SOLVENT AT A MAXIMUM TEMPERATURE OF ABOUT 350*F., EVAPORATING SOLVENT FROM THE COMPOSITION APPLIED TO SAID SURFACE AT A MAXIMUM TEMPERATURE OF ABOUT 325*F., PLACING THE SYNTHETIC ORGANIC RESIN SHEET AND THE POLYVINYL ACETAL SHEET TOGETHER WITHTHE COATED SURFACE THEREBETWEEN TO FORM AN ASSEMBLY, AND SUBJECTING THE ASSEMBLY TO PRESSURE AND A TEMPERATURE BETWEEN ABOUT 190 AND 325*F. TO BOND THE SHEETS TOGETHER.
Claim 2
Independent Claim
125 words
THE METHOD OF BONDING A SHEET OF SYNTHETIC ORGANIC RESIN COMPRISING A COPOLYMER OF AN ETHYLENICALLY UNSATURATED POLYMERIZABLE COMPOUND AND AN UNSATURATED POLYESTER OF A POLYHYDRIC ACOHOL AND A POLYBASIC ACID TO A SHEET OF POLYVINYL ACETAL WHICH COMPRISES APPLYING TO A SURFACE OF SAID SHEET OF SYNTHETIC ORGANIC RESIN A COATING OF A COMPOSITION CONTAINING A POLYVALENT METAL SALT AND A SOLVENT AT A MAXIMUM TEMPERATURE OF ABOUT 350*F., EVAPORATING SOLVENT FROM THE COMPOSITION APPLIED TO SAID SURFACE AT A MAXIMUM TEMPERATURE OF ABOUT 325*F., PLACING THE SYNTHETIC ORGANIC RESIN SHEET AND THE POLYVINYL ACETAL SHEET TOGETHER WITHTHE COATED SURFACE THEREBETWEEN TO FORM AN ASSEMBLY, AND SUBJECTING THE ASSEMBLY TO PRESSURE AND A TEMPERATURE BETWEEN ABOUT 190 AND 325*F. TO BOND THE SHEETS TOGETHER.
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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) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |