Patent US3409712A successfully refreshed from Google Patents.
US3409712A
Expired / Lapsed
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Method of devolatilization of synthetic resinous thermoplastic materials
Assignee: Dow Chemical Co
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Filing: 1966-07-22
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Granted: 1968-11-05
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Expires: 1986-07-22
Abstract
No abstract record available.
Inventors
- 👤 Douglas S Chisholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:23
CPC Classifications
B; B05; B05B; B05B3/00; B05B3/001; B01; B01D; B01D1/00; B01D1/22; B01D1/222; B01D19/00; B01D19/0042; B01D19/0052; B01J; B01J19/00; B01J19/28; B05B3/02; B05B3/10; B05B3/1007; B05B3/1021; B29; B29B; B29B9/00; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/76; C; C08; C08F; C08F6/00; C08F6/001; C08F6/005; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00389; B29C48/03; B29C48/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A METHOD FOR DEVOLATILIZATION OF SYNTHETIC RESINOUS THERMOPLASTIC MATERIALS, THE STEPS OF THE METHOD COMPRISING CONFINING A MASS OF A SYNTHETIC RESINOUS THERMOPLASTIC MATERIAL VOLATILE MATERIALS THEREIN WITHIN A PERFORATE CONFIGURATION, ROTATING THE CONFIGURATION AT A SPEED SUFFICIENT TO CAUSE HEAT PLASTIFIED SYNTHETIC RESINOUS MATERIAL TO BE PASSED OUTWARDLY FROM THE CONFIGURATION, HEATING THE RESINOUS MATERIAL TO A TEMPERATURE SUFFICIENT TO HEAT PLASTIFY THE MATERIAL, SPREADING HEAT PLASTIFIED RESINOUS MATERIAL BY MEANS OF CENTRIFUGAL FORCE INTO A FILM, PASSING AS GAS OVER AN EXPOSED SURFACE OF THE FILM, DEFORMING THE FILM UNDER THE INFLUENCE OF CENTRIFUGAL FORCE INTO A DESIRED CONFIGURATION, AND SUBEQUENTLY COOLING THE RESINOUS MATERIAL BELOW ITS THERMOPLASTIC TEMPERATURE.
Claim 2
Independent Claim
111 words
A METHOD FOR DEVOLATILIZATION OF SYNTHETIC RESINOUS THERMOPLASTIC MATERIALS, THE STEPS OF THE METHOD COMPRISING CONFINING A MASS OF A SYNTHETIC RESINOUS THERMOPLASTIC MATERIAL VOLATILE MATERIALS THEREIN WITHIN A PERFORATE CONFIGURATION, ROTATING THE CONFIGURATION AT A SPEED SUFFICIENT TO CAUSE HEAT PLASTIFIED SYNTHETIC RESINOUS MATERIAL TO BE PASSED OUTWARDLY FROM THE CONFIGURATION, HEATING THE RESINOUS MATERIAL TO A TEMPERATURE SUFFICIENT TO HEAT PLASTIFY THE MATERIAL, SPREADING HEAT PLASTIFIED RESINOUS MATERIAL BY MEANS OF CENTRIFUGAL FORCE INTO A FILM, PASSING AS GAS OVER AN EXPOSED SURFACE OF THE FILM, DEFORMING THE FILM UNDER THE INFLUENCE OF CENTRIFUGAL FORCE INTO A DESIRED CONFIGURATION, AND SUBEQUENTLY COOLING THE RESINOUS MATERIAL BELOW ITS THERMOPLASTIC TEMPERATURE.
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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |