Patent US3658980A successfully refreshed from Google Patents.
US3658980A
Expired / Lapsed
US
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Internal additive for controlled cohesion in polymerized olefin films
Assignee: DowBrands Inc
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Filing: 1968-09-23
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Granted: 1972-04-25
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Expires: 1988-09-23
Abstract
Abstract COHESIVE POLYMERIZED OLEFIN FILMS ARE PREPARED BY (A) INTIMATELY ADMIXING A POLYMERIZED OLEFIN, SUCH AS POLYETHYLENE, WITH A SMALL AMOUNT OF A VISCOUS LIQUID, SUCH AS POLYPROPYLENE GLYCOL HAVING A MOLECULAR WEIGHT OF 2,000, AND (B) EXTRUDING THE RESULTING MIXTURE IN THE FORM OF A THIN, TRANSPARENT FLEXIBLE SHEET.
Inventors
- 👤 Robert Joseph Caiola
- 👤 William F Mick
- 👤 Oliver Bernard Amley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:33
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/06; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L71/00; C08L71/02; C08L71/03
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |