Patent US2718666A successfully refreshed from Google Patents.
US2718666A
Expired / Lapsed
US
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Process of longitudinally stretching film of organic linear polymeric material
Assignee: EIDP Inc
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Filing: 1951-09-24
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Granted: 1955-09-27
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Expires: 1971-09-24
Abstract
No abstract record available.
Inventors
- 👤 Kenneth L Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:23
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/04; B29C55/06; B29C55/065
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
A PROCESS WHICH COMPRISES EXTRUDING SYNTHETIC, LINEAR, ORGANIC, FILM-FORMING POLYMERIC MATERIAL IN THE FORM OF A FILM HAVING BEADED LONGITUDINAL EDGES, SAID BEADED EDGES HAVING A WIDTH OF FROM ABOUT 0.125 TO ABOUT 0.5 OF AN INCH, AND A THICKNESS OF AT LEAST TWICE THAT OF THE MAIN BODY PORTION OF THE FILM, AND STRETCHING SAID FILM LONGITUDINALLY ON AND BETWEEN CLOSELY SPACED STRETCHING ROLLS DRIVEN AT DIFFERENT SPEEDS WHILE MAINTAINING THE BEADED EDGES OF THE FILM AND THE MAIN BODY PORTION OF THE FILM FOR SUBSTANTIALLY ITS ENTIRE WIDTH IN CONTACT WITH THE SURFACE OF SAID ROLLS AND PERMITTING SAID FILM TO SHRINK TRANSVERSELY.
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) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |