US3100721A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing microporous films and coatings
Assignee: EIDP Inc
•
Filing: 1961-02-21
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Granted: 1963-08-13
•
Expires: 1981-02-21
Abstract
No abstract record available.
Inventors
- 👤 Holden Ellsworth Kissam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:01
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/12; D06N3/125; B; B29; B29C; B29C44/00; B29C44/20; B29C44/28; C; C08; C08J; C08J9/00; C08J9/28; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/564; D06N3/04; D06N3/10; D06N3/121; Y; Y10; Y10S; Y10S264/00; Y10S264/13; Y10S264/63
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
AN IMPROVED PROCESS FOR PRODUCING MICROPOROUS FILMS AND COATINGS WHICH COMPRISES (1) FORMING A POLYMERIC SOLUTION HAVING AS ESSENTIAL CONSTITUENTS A POLYMERIC COMPONENT AND SOLVENT FOR SAID POLYMERIC COMPONENT, SAID POLYMERIC COMPOMENT HAVING A MAXIMUM ELASTIC DEFORMATION STRENGTH, UNDER THE DRYING CONDITIONS OF STEP (5) BELOW, OF AT LEAST 100; (2) ADDING TO SAID POLYMERIC SOLUTION, AT A TEMPERATURE AT WHICH A COLLOIDAL DISPERSION WILL FORM, AN INERT LIQUID, WHICH IS NON-SOLVENT FOR SAID POLYMER BUT WHICH IS MISCIBLE WITH SAID SOLVENT, UNTIL ABOUT THE POINT AT WHICH A SUBSTANTIALLY COLLOIDAL POLYMERIC DISPERSION IS FORMED, SAID SUBSTANTIALLY COLLOIDAL DISPERSION HAVING A VISCOSITY GREATER THAN ABOUT 1 POISE AND A POLYMER CONCENTRATION OF GREATER THAN ABOUT 7% BY WEIGHT; (3) COATING SAID DISPERSION ONTO A SUBSTRATE; (4) DIRECTLY BATHING THE RESULTANT COATING, AT ABOUT THE TEMPERATURE AT WHICH THE COLLOIDAL DISPERSION WAS FORMED, WITH A LIQUID WHICH IS A NON-SOLVENT FOR SAID POLYMERIC COMPONENT AND MISCIBLE WITH SAID SOLVENT TO REMOVE THE SOLVENT; AND (5) DRYING THE RESULTING PRODUCT.
Claim 2
Dependent Claim
168 words
AN IMPROVED PROCESS FOR PRODUCING MICROPOROUS FILMS AND COATINGS WHICH COMPRISES (1) FORMING A POLYMERIC SOLUTION HAVING AS ESSENTIAL CONSTITUENTS A POLYMERIC COMPONENT AND SOLVENT FOR SAID POLYMERIC COMPONENT, SAID POLYMERIC COMPOMENT HAVING A MAXIMUM ELASTIC DEFORMATION STRENGTH, UNDER THE DRYING CONDITIONS OF STEP (5) BELOW, OF AT LEAST 100; (2) ADDING TO SAID POLYMERIC SOLUTION, AT A TEMPERATURE AT WHICH A COLLOIDAL DISPERSION WILL FORM, AN INERT LIQUID, WHICH IS NON-SOLVENT FOR SAID POLYMER BUT WHICH IS MISCIBLE WITH SAID SOLVENT, UNTIL ABOUT THE POINT AT WHICH A SUBSTANTIALLY COLLOIDAL POLYMERIC DISPERSION IS FORMED, SAID SUBSTANTIALLY COLLOIDAL DISPERSION HAVING A VISCOSITY GREATER THAN ABOUT 1 POISE AND A POLYMER CONCENTRATION OF GREATER THAN ABOUT 7% BY WEIGHT; (3) COATING SAID DISPERSION ONTO A SUBSTRATE; (4) DIRECTLY BATHING THE RESULTANT COATING, AT ABOUT THE TEMPERATURE AT WHICH THE COLLOIDAL DISPERSION WAS FORMED, WITH A LIQUID WHICH IS A NON-SOLVENT FOR SAID POLYMERIC COMPONENT AND MISCIBLE WITH SAID SOLVENT TO REMOVE THE SOLVENT; AND (5) DRYING THE RESULTING PRODUCT.
References Cited (Backward Citations)
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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) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |