Patent US3284228A successfully refreshed from Google Patents.
US3284228A
Expired / Lapsed
US
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Method of rendering polyolefine surfaces non-adherent
Assignee: Tetra Pak AB
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Filing: 1963-02-11
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Granted: 1966-11-08
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Expires: 1983-02-11
Abstract
No abstract record available.
Inventors
- 👤 Ekstrom Karl-Erik
- 👤 Lindh Thorsten Lennartson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:34
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/004; B29C66/0046; B29C65/00; B29C65/02; B29C65/18; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/432; B29C66/4322; B29C66/70; B29C66/71; B65; B65B; B65B25/00; B65B25/001; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29K; B29K2023/00; C08J2323/00; C08J2323/02; C08J2491/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A METHOD OF TREATING PACKAGING MATERIAL HAVING AT LEAST A SURFACE LAYER OF POLYETHYLENE WHICH COMPRISES COATING AND SURFACE LAYER WITH MOLTEN PARAFFIN WAX HAVING A MELTING TEMPERATURE SUBSTANTIALLY WITHIN THE MELTING POINT RANGE OF SAID POLYETHYLENE, COOLING SAID COATED SURFACE TO SOLIDIFY SAID MOLTEN PARAFFIN WAX, PRESSING A SOLID SURFACE HEATED TO A TEMPERATURE ABOVE THE MELTING POINT RANGE OF SAID POLYETHYLENE AGAINST SAID COATED SURFACE AND THEN WHILE STILL HOT SEPARATING SAID SOLID SURFACE FROM SAID COATED SURFACE, THE THICKNESS OF SAID COATING OF PARAFFIN, THE TEMPERATURE OF SAID SOLID SURFACE, THE TIME OF CONTACT BETWEEN SAID SOLID SURFACE AND SAID COATED SURFACE AND THE PRESSURE BETWEEN SAID SOLID SURFACE AND SAID COATED SURFACE BEING SO ADJUSTED THAT SAID COATED SURFACE DOES NOT ADHERE AND OFFSET TO SAID SOLID SURFACE.
Claim 2
Independent Claim
132 words
A METHOD OF TREATING PACKAGING MATERIAL HAVING AT LEAST A SURFACE LAYER OF POLYETHYLENE WHICH COMPRISES COATING AND SURFACE LAYER WITH MOLTEN PARAFFIN WAX HAVING A MELTING TEMPERATURE SUBSTANTIALLY WITHIN THE MELTING POINT RANGE OF SAID POLYETHYLENE, COOLING SAID COATED SURFACE TO SOLIDIFY SAID MOLTEN PARAFFIN WAX, PRESSING A SOLID SURFACE HEATED TO A TEMPERATURE ABOVE THE MELTING POINT RANGE OF SAID POLYETHYLENE AGAINST SAID COATED SURFACE AND THEN WHILE STILL HOT SEPARATING SAID SOLID SURFACE FROM SAID COATED SURFACE, THE THICKNESS OF SAID COATING OF PARAFFIN, THE TEMPERATURE OF SAID SOLID SURFACE, THE TIME OF CONTACT BETWEEN SAID SOLID SURFACE AND SAID COATED SURFACE AND THE PRESSURE BETWEEN SAID SOLID SURFACE AND SAID COATED SURFACE BEING SO ADJUSTED THAT SAID COATED SURFACE DOES NOT ADHERE AND OFFSET TO SAID SOLID SURFACE.
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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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |