US5244729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric film comprising a coating layer of vermiculite platelets
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1992-01-31
•
Granted: 1993-09-14
•
Expires: 2012-01-31
Abstract
Abstract A polymeric film comprising a substrate layer of polymeric material having on at least one surface thereof a coating layer comprising vermiculite platelets wherein 50 to 100% by number of the platelets have a particle size in the range 0.5 to 5.0 μm. The film exhibits oxygen barrier properties and is suitable for use as a packaging film.
Inventors
- 👤 Anthony G. Harrison
- 👤 William N. E. Meredith
- 👤 David E. Higgins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:32
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/02; B32; B32B; B32B27/00; B32B27/06; B05D2401/00; B05D2401/20; B05D2601/00; B05D2601/20; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/25; Y10T428/259; Y10T428/26; Y10T428/261; Y10T428/29; Y10T428/2982; Y10T428/31504; Y10T428/31786; Y10T428/31855
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
65 words
A polymeric film comprising a substrate layer of polymeric material having on at least one surface thereof a coating layer comprising vermiculite platelets wherein 50 to 100% by number of the platelets have a particle size in the range of 0.5 to 5.0 μm and wherein from 60 to 100% of said vermiculite particles have an aspect ratio in the range from 500 to 1500.
Claim 2
Dependent Claim
65 words
A polymeric film comprising a substrate layer of polymeric material having on at least one surface thereof a coating layer comprising vermiculite platelets wherein 50 to 100% by number of the platelets have a particle size in the range of 0.5 to 5.0 μm and wherein from 60 to 100% of said vermiculite particles have an aspect ratio in the range from 500 to 1500.
Claim 3
Dependent Claim
28 words
A polymeric film according to claim 1 wherein 80 to 100% by number of the vermiculite platelets have a particle size in the range 0.1 to 5.0 μm.
Claim 4
Dependent Claim
23 words
A polymeric film according to claim 1 wherein 0 to 5% of the vermiculite platelets have a particle size less than 0.1 μm.
Claim 5
Dependent Claim
23 words
A polymeric film according to claim 1 wherein 0 to 10% of the vermiculite platelets have a particle size greater than 5.0 μm.
Claim 6
Dependent Claim
34 words
A polymeric film according to claim 1 wherein at least 70% by number of vermiculite platelets have a ratio of the maximum width to the minimum width of a platelet of less than 2:1.
Claim 7
Dependent Claim
27 words
A polymeric film according to claim 1 wherein at least 60% by number of vermiculite platelets have a thickness in the range from 25 to 40 A.
Claim 8
Dependent Claim
18 words
A polymeric film according to claim 1 wherein the substrate comprises a biaxially oriented film of polyethylene terephthalate.
Claim 9
Dependent Claim
17 words
A polymeric film according to claim 1 wherein the substrate comprises a biaxially oriented film of polypropylene.
Claim 10
Independent Claim
70 words
A method of producing a polymeric film by forming a substrate layer of polymeric material, and applying to at least one surface thereof a coating layer comprising vermiculite platelets wherein 50 to 100% by number of the platelets have a particle size in the range 0.5 to 5.0 μm. and wherein from 60 to 100% of said vermiculite platelets have an aspect ratio in the range from 500 to 1500.
Claim 11
Independent Claim
70 words
A method of producing a polymeric film by forming a substrate layer of polymeric material, and applying to at least one surface thereof a coating layer comprising vermiculite platelets wherein 50 to 100% by number of the platelets have a particle size in the range 0.5 to 5.0 μm. and wherein from 60 to 100% of said vermiculite platelets have an aspect ratio in the range from 500 to 1500.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-09-13 | 1997-03-15 | 1997-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-13 | 2001-03-15 | 2001-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-13 | 2005-03-15 | 2005-09-14 | $7700.00 | Window Closed / Lapsed |