Patent EP0121786A1 successfully refreshed from Google Patents.
US2766485A
Expired / Lapsed
US
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Manufacture of microporous screens
Assignee: CAOUTCHOUC MANUFACTURE "DYANAMIC" Cie
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Filing: 1952-11-04
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Granted: 1956-10-16
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Expires: 1972-11-04
Abstract
No abstract record available.
Inventors
- 👤 Jevelot Rene
- 👤 Ahrweiler Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:22
CPC Classifications
A; A63; A63H; A63H19/00; A63H19/30; B; B01; B01D; B01D39/00; C; C08; C08J; C08J9/00; C08J9/28; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/489; H01M50/491; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S264/00; Y10S264/61; Y10S424/00; Y10S424/07; Y10S521/00; Y10S521/919; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/249986
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PROCESS OF MAKING A MICROPOROUS SCREEN WHICH COMPRISES INTIMATELY MIXING A FINELY-DIVIDED SYNTHETIC THERMOPLASTIC RESIN AND A DRY MICROPOROUS ADSORBENT ACID- AND SOLVENT-RESISTANT MATERIAL, SUBJECTING THE RESULTING MIXTURE TO MODERATE PRESSURE TO FORM A SHEET THEREFROM, SAID PRESSURE BEING SUFFICIENT TO FORM THE DESIRED SHEET BUT INSUFFICIENT TO DESTROY THE POROSITY OF THE DRY ABSORBENT MATERIAL, AND HEATING THE RESULTING SHEET AT A TEMPERATURE OF 120 TO 180* C.
Claim 2
Dependent Claim
70 words
A PROCESS OF MAKING A MICROPOROUS SCREEN WHICH COMPRISES INTIMATELY MIXING A FINELY-DIVIDED SYNTHETIC THERMOPLASTIC RESIN AND A DRY MICROPOROUS ADSORBENT ACID- AND SOLVENT-RESISTANT MATERIAL, SUBJECTING THE RESULTING MIXTURE TO MODERATE PRESSURE TO FORM A SHEET THEREFROM, SAID PRESSURE BEING SUFFICIENT TO FORM THE DESIRED SHEET BUT INSUFFICIENT TO DESTROY THE POROSITY OF THE DRY ABSORBENT MATERIAL, AND HEATING THE RESULTING SHEET AT A TEMPERATURE OF 120 TO 180* C.
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) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |