Patent US3236788A successfully refreshed from Google Patents.
US3236788A
Expired / Lapsed
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Process of forming porous thermoplastic structures and films
Assignee: S-J Chemical Co
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Filing: 1961-07-03
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Granted: 1966-02-22
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Expires: 1981-07-03
Abstract
No abstract record available.
Inventors
- 👤 Smith-Johannsen Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:14
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; C08J2201/00; C08J2201/04; C08J2201/048; C08J2201/0484; Y; Y10; Y10S; Y10S264/00; Y10S264/13; Y10T; Y10T428/00; Y10T428/24; Y10T428/24174; Y10T428/24182; Y10T428/249921; Y10T428/249953
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
THE PROCESS OF FORMING POROUS THERMOPLASTIC STRUC TURES AND FILMS WHICH COMPRISES FREEZING A THIN FILM OF AN AQUEOUS DISPERSION OF FILM-FORMING, FREEZE COAGULABLE, RESINOUS THERMOPLASTIC VINYL PARTICLES AT A TEMPERATURE BELOW THE FREEZING POINT OF THE DISPERSION ON A SILICONE SURFACE PROVIDED WITH FREEZING NUCLEI, MAINTAINING THE FROZEN DISPERSION AT ITS FREEZING TEMPERATURE UNTIL THE FROZEN DISPERSION HAS REACHED ITS FREEZING TEMPERATURE, THAWING THE FROZEN DISPERSION TO FORM A POROUS COAGULATE OF THREADLIKE STRUCTURES AND SUBJECTING THE THAWED COAGULATE TO A SHEARING ACTION SUFFICIENT TO FORM A LIQUID DISPERSION OF THE THAWED COAGULATE.
Claim 2
Dependent Claim
94 words
THE PROCESS OF FORMING POROUS THERMOPLASTIC STRUC TURES AND FILMS WHICH COMPRISES FREEZING A THIN FILM OF AN AQUEOUS DISPERSION OF FILM-FORMING, FREEZE COAGULABLE, RESINOUS THERMOPLASTIC VINYL PARTICLES AT A TEMPERATURE BELOW THE FREEZING POINT OF THE DISPERSION ON A SILICONE SURFACE PROVIDED WITH FREEZING NUCLEI, MAINTAINING THE FROZEN DISPERSION AT ITS FREEZING TEMPERATURE UNTIL THE FROZEN DISPERSION HAS REACHED ITS FREEZING TEMPERATURE, THAWING THE FROZEN DISPERSION TO FORM A POROUS COAGULATE OF THREADLIKE STRUCTURES AND SUBJECTING THE THAWED COAGULATE TO A SHEARING ACTION SUFFICIENT TO FORM A LIQUID DISPERSION OF THE THAWED COAGULATE.
References Cited (Backward Citations)
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Cited
US1874546A
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US2187146A
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US2426127A
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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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |