Patent US2904844A successfully refreshed from Google Patents.
US2904844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for embossing polyvinyl acetal sheets
Assignee: EIDP Inc
•
Filing: 1956-02-10
•
Granted: 1959-09-22
•
Expires: 1976-02-10
Abstract
No abstract record available.
Inventors
- 👤 Smithies Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:26
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10761; B29; B29C; B29C48/00; B29C48/022; B32B17/10559; B32B17/10577; B32B17/10807; B32B17/10981; C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/103; B29C48/001; B29C48/0018; B29C48/03; B29C48/07; B29C48/08; B29K; B29K2995/00; B29K2995/0037; B29K2995/0072
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS FOR EXTRUDING POLYVINYL ACETAL RESIN SHEETS HAVING REDUCED PREMATURE ADHESION WHICH COMPRISES EXTRUDING AT A TEMPERATURE ABOVE 164* C. AND UNDER A PRESSURE OF AT LEAST 290 P.S.I. A PLASTICIZED POLYVINYL ACETAL RESIN CONTAINING FROM 0.6 TO 15% BY WEIGHT OF THE PLASTICIZED RESIN OF WATER AT THE EXTRUSION TEMPERATURE OF THE POLYMER, WHEREBY A UNIFORMLY SURFACE ROUGHENED SHEET IS OBTAINED.
Claim 2
Dependent Claim
63 words
A PROCESS FOR EXTRUDING POLYVINYL ACETAL RESIN SHEETS HAVING REDUCED PREMATURE ADHESION WHICH COMPRISES EXTRUDING AT A TEMPERATURE ABOVE 164* C. AND UNDER A PRESSURE OF AT LEAST 290 P.S.I. A PLASTICIZED POLYVINYL ACETAL RESIN CONTAINING FROM 0.6 TO 15% BY WEIGHT OF THE PLASTICIZED RESIN OF WATER AT THE EXTRUSION TEMPERATURE OF THE POLYMER, WHEREBY A UNIFORMLY SURFACE ROUGHENED SHEET IS OBTAINED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |