US3718059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permeable thermoplastic film product and method
Assignee: Mobil Oil AS
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Filing: 1969-12-18
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Granted: 1973-02-27
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Expires: 1989-12-18
Abstract
Abstract THE PRESENT INVENTION RELATES TO A THERMOPLASTIC FILM PRODUCT AND A METHOD EMPLOYED TO INCREASE THE PERMEABILITY OF THERMOPLASTIC FILMS BY PRESSING SUCH FILMS, UTILIZING A RESILIENT SURFACE PRESSURE ROLLER, INTO CONTACT WITH A DISCONTINUOUS SURFACE OF A COATED ABRASIVE MATERIAL WHEREBY HIGHLY PERMEABLE FILMS ARE PRODUCED WHICH PERMIT CONTROLLED PASSAGE OF GASES OR VAPORS SUCH AS MOISTURE VAPOR THERETHROUGH.
Inventors
- 👤 W Clayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:22
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/02; B29C59/04; B26; B26F; B26F1/00; B26F1/24; Y; Y10; Y10S; Y10S264/00; Y10S264/70; Y10T; Y10T83/00; Y10T83/02; Y10T83/0237; Y10T83/0244; Y10T83/283; Y10T83/293; Y10T83/929; Y10T83/9314
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |