US2909810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of polyvinyl-butyral foils
Assignee: Dynamit Nobel AG
•
Filing: 1957-12-04
•
Granted: 1959-10-27
•
Expires: 1977-12-04
Abstract
No abstract record available.
Inventors
- 👤 Jensch Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:49
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10761; B29; B29C; B29C48/00; B29C48/022; B32B17/10009; B32B17/10036; B32B17/10559; B32B17/10577; B32B17/10807; B32B17/10981; B29C48/03; B29C48/07; B29C48/08; B29K; B29K2995/00; B29K2995/0037; B29K2995/0072
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR THE PRODUCTION OF AN EXTRUDED POLYVINYLBUTYRAL FOIL FOR USE IN THE MANUFACTURE OF SAFETY GLASS, COMPRISING THE STEPS OF ADDING TO THE POLYVINYLBUTYRAL MATERIAL BEFORE EXTRUSION A LIQUID IN AN AMOUNT OF FROM THREE TO FIFTEEN PERCENT BY WEIGHT OF THE POLYVINYLBUTYRAL, SAID LIQUID HAVING A BOILING POINT WHICH IS BELOW THE TEMPERATURE AT WHICH THE POLYVINYLBUTYRAL MATERIAL IS EXTRUDED, AND THEREAFTER EXTRUDING SAID MATERIAL TO PRODUCE A FOIL HAVING A ROUGHENED SURFACE.
Claim 2
Dependent Claim
76 words
A PROCESS FOR THE PRODUCTION OF AN EXTRUDED POLYVINYLBUTYRAL FOIL FOR USE IN THE MANUFACTURE OF SAFETY GLASS, COMPRISING THE STEPS OF ADDING TO THE POLYVINYLBUTYRAL MATERIAL BEFORE EXTRUSION A LIQUID IN AN AMOUNT OF FROM THREE TO FIFTEEN PERCENT BY WEIGHT OF THE POLYVINYLBUTYRAL, SAID LIQUID HAVING A BOILING POINT WHICH IS BELOW THE TEMPERATURE AT WHICH THE POLYVINYLBUTYRAL MATERIAL IS EXTRUDED, AND THEREAFTER EXTRUDING SAID MATERIAL TO PRODUCE A FOIL HAVING A ROUGHENED SURFACE.
References Cited (Backward Citations)
US2120935A
Cited
US2528200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-26 | 1963-04-27 | 1963-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-26 | 1967-04-27 | 1967-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-26 | 1971-04-27 | 1971-10-27 | $7700.00 | Window Closed / Lapsed |