Patent US3277221A successfully refreshed from Google Patents.
US3277221A
Expired / Lapsed
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Method for making a collapsed ultramicrocellular structure
Assignee: EIDP Inc
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Filing: 1963-11-27
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Granted: 1966-10-04
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Expires: 1983-11-27
Abstract
No abstract record available.
Inventors
- 👤 Parrish Robert Guy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:50
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/507; B29L; B29L2023/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
IN A METHOD FOR THE PRODUCTION OF AN ULTRA-MICROCELLULAR STRUCTURE IN SHEET FROM WHEREIN A SOLUTION OF A HIGH MOLECULAR WEIGHT SYNTHETIC CRYSTALLINE HYDROCARBON POLYMER IN AN ACTTIVATING LIQUID IS EXTRUDED THROUGH AN ANNULAR ORIFICE TO GENERACTE SAID ULTRAMICROCELLULAR STRUCTURE IN THE FORM OF A BLOWN TUBE, WHEREIN LATERAL STRETCHING OF THE TUBE IS EFFECTED BY CONFINING AT LEAST A PORTION OF VAPORIZING ACTIVATING LIQUID THEREIN, AND WHEREIN THE LATERALLY STRETCHED TUBE IS PINCHED BETWEEN A PAIR OF TOTATING PRESSURE ROLLS TO FORM A SHEET, SAID ULTRAMICROCELLULAR STRUCTURE BEING COMPOSED OF POLYHEDRAL SHAPED CELLS WHEREIN SUBSTANTIALLY ALL OF THE POLYMER IS PRESENT AS FILMY ELEMENTS OF A THICKNESS LESS THAN 2 MICONS AND WHEREIN THE POLYMER IN THE CELL WALLS EXHIBITS UNIPLANAR ORIENTATION AND A UNIFORM TEXTIRE; THE IMPROVEMENT, FOR OBTAINING A SEMI-TEXTILE-LIKE OR PAPER-LIKE SHEET PRODUCT OF COLLAPSED CELLS, COMPRISING LONGITUDINALLY STRETCHING THE TUBE BETWEEN SAID ORIFICE AND SAID ROTATING PRESSURE ROLLS, THE LONGITUDINAL AND LATERAL STRETCHING COMBINING TO
Claim 2
Dependent Claim
160 words
IN A METHOD FOR THE PRODUCTION OF AN ULTRA-MICROCELLULAR STRUCTURE IN SHEET FROM WHEREIN A SOLUTION OF A HIGH MOLECULAR WEIGHT SYNTHETIC CRYSTALLINE HYDROCARBON POLYMER IN AN ACTTIVATING LIQUID IS EXTRUDED THROUGH AN ANNULAR ORIFICE TO GENERACTE SAID ULTRAMICROCELLULAR STRUCTURE IN THE FORM OF A BLOWN TUBE, WHEREIN LATERAL STRETCHING OF THE TUBE IS EFFECTED BY CONFINING AT LEAST A PORTION OF VAPORIZING ACTIVATING LIQUID THEREIN, AND WHEREIN THE LATERALLY STRETCHED TUBE IS PINCHED BETWEEN A PAIR OF TOTATING PRESSURE ROLLS TO FORM A SHEET, SAID ULTRAMICROCELLULAR STRUCTURE BEING COMPOSED OF POLYHEDRAL SHAPED CELLS WHEREIN SUBSTANTIALLY ALL OF THE POLYMER IS PRESENT AS FILMY ELEMENTS OF A THICKNESS LESS THAN 2 MICONS AND WHEREIN THE POLYMER IN THE CELL WALLS EXHIBITS UNIPLANAR ORIENTATION AND A UNIFORM TEXTIRE; THE IMPROVEMENT, FOR OBTAINING A SEMI-TEXTILE-LIKE OR PAPER-LIKE SHEET PRODUCT OF COLLAPSED CELLS, COMPRISING LONGITUDINALLY STRETCHING THE TUBE BETWEEN SAID ORIFICE AND SAID ROTATING PRESSURE ROLLS, THE LONGITUDINAL AND LATERAL STRETCHING COMBINING TO
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |