Patent US3074841A successfully refreshed from Google Patents.
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 14:44
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.
References Cited (Backward Citations)
GB189606858A
Cited
US2357345A
Cited
US2397231A
Cited
US2429420A
Cited
US2418018A
Cited
US2417837A
Cited
US2405602A
Cited
US2534654A
Cited
US2479501A
Cited
US2592601A
Cited
US2716081A
Cited
US2676950A
Cited
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 |