US3622375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sealable oriented polypropylene film
Assignee: Kalle GmbH and Co KG
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Filing: 1968-11-25
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Granted: 1971-11-23
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Expires: 1988-11-25
Abstract
Abstract This invention relates to an oriented polyolefin film having a heat-sealable layer of a thermoplastic polymer thereon in which the polyolefin film is a mixture of 1 to 15 percent by weight, preferably 2 to 8 percent, of polyethylene, and 85 to 99 percent by weight, preferably 92 to 98 percent, of polypropylene.
Inventors
- 👤 Markus Siebel
- 👤 Gerhard Buchheister
- 👤 Horst Gebler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:22
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/45; B29C66/70; B29C66/71; C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C09; C09J; C09J123/00; C09J123/02; C09J123/10; C09J123/12; C09J7/00; C09J7/20; C09J7/22; C09J7/30; C09J7/35; C08L23/04; C08L23/06; C08L2666/00; C08L2666/02; C08L2666/04; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/266
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
22 words
An oriented polyolefin film according to claim 1 in which the polyolefin film has a thickness of 15 to 35 Mu .
Claim 2
Dependent Claim
26 words
An oriented polyolefin film according to claim 1 in which the polyolefin film has a turbidity below 8 percent and a heat-sealing strength above 80 g./cm.
Claim 3
Dependent Claim
27 words
An oriented polyolefin film according to claim 1 in which the turbidity is about 4 to 6 percent and the heat-sealing strength is 80 to 120 g./cm.
References Cited (Backward Citations)
US3036987A
Cited
US3281501A
Cited
US3262808A
Cited
US3265771A
Cited
US3372049A
Cited
US3483023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |