US3997701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated polyester films
Assignee: Imperial Chemical Industries Ltd
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Filing: 1974-03-11
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Granted: 1976-12-14
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Expires: 1994-03-11
Abstract
Abstract Antistatic polyester films suitable for montage printing processes are made by coating the polyester film during or after orientation with an antistatic composition comprising lithium nitrate and polymeric binder, such as an acrylic copolymer.
Inventors
- 👤 Cyril John Ealding
- 👤 Gordon Edmund Alfred Pears
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:37
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/16; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/044; C08J7/046; F; F01; F01C; F01C19/00; F01C19/005; C08J2367/00; C08J2367/02; C08J2433/00; Y; Y10; Y10S; Y10S430/00; Y10S430/135; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
38 words
An antistatic polyester film coated on one side with an antistatic layer comprising lithium nitrate and an acrylic or methacrylic polymer or copolymer binder wherein the coat weight of lithium nitrate is at least 100 μg/dm 2 .
Claim 2
Dependent Claim
38 words
An antistatic polyester film coated on one side with an antistatic layer comprising lithium nitrate and an acrylic or methacrylic polymer or copolymer binder wherein the coat weight of lithium nitrate is at least 100 μg/dm 2 .
Claim 3
Dependent Claim
25 words
An antistatic polyester film according to claim 1, in which the coat weight of the binder is about 1.7 times that of the lithium nitrate.
Claim 4
Dependent Claim
44 words
An antistatic polyester film coated on each side with an antistatic layer comprising lithium nitrate and an acrylic or methacrylic polymer or copolymer binder wherein the coat weight of lithium nitrate on each side of the film is at least 100 μg/dm 2 .
Claim 5
Dependent Claim
44 words
An antistatic polyester film coated on each side with an antistatic layer comprising lithium nitrate and an acrylic or methacrylic polymer or copolymer binder wherein the coat weight of lithium nitrate on each side of the film is at least 100 μg/dm 2 .
Claim 6
Dependent Claim
25 words
An antistatic polyester film according to claim 3 in which the coat weight of the binder is about 1.7 times that of the lithium nitrate.
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) | 1979-12-14 | 1980-06-14 | 1980-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-14 | 1984-06-14 | 1984-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-14 | 1988-06-14 | 1988-12-14 | $7700.00 | Window Closed / Lapsed |