Patent US3579618A successfully refreshed from Google Patents.
US3579618A
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High speed fibrillation process
Assignee: Phillips Petroleum Co
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Filing: 1968-08-09
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Granted: 1971-05-18
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Expires: 1988-08-09
Abstract
Abstract PREVENTING SUCH SEVERED RIBBONS FROM BECOMING ENTAGLED IN THE STRETCHING ROLLS. A PROCESS FOR FORMING A FIBRILLATED PRODUCT COMPRISING FORMIG A FILM FROM A FLATTENED PLASTIC TUBE, MOLECULARLY ORIENTING THE FILM AND FIBRILLATING THE ORIENTED FILM, WHEREIN VACUUM MEANS REMOVE THE SYSTEM ANY LOOSE ENDS OF RIBBONS THAT MAY BECOME SERVED DURING ORIENTATION,
Inventors
- 👤 Dan F Stewart
- 👤 Bob C Blair
- 👤 Max E Greene
- 👤 Lloyd R Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:45
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/42; D01D5/423; B; B29; B29C; B29C2793/00; B29C2793/0063; B29C48/00; B29C48/001; B29C48/0013; B29C48/0014; B29C48/0018; B29C48/0019; B29C48/0022; B29C48/03; B29C48/09; B29C48/10; B29C48/16; B29C48/18; B29C48/21; Y; Y10; Y10S; Y10S264/00; Y10S264/47
Claims Analysis
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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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |