US4910235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester film for recording materials
Assignee: Fujifilm Holdings Corp
•
Filing: 1988-05-23
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Granted: 1990-03-20
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Expires: 2008-05-23
Abstract
Abstract A polyester film containing 20% or less by weight of a mixture comprising a white pigment and a pearlescent pigment is disclosed. The polyester film has a pearly luster and a high degree of whiteness.
Inventors
- 👤 Seimi Satake
- 👤 Yukio Shinagawa
- 👤 Toshio Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:03
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08K; C08K3/00; C08K3/01; C08K3/013; C08K9/00; C08K9/02; G; G03; G03C; G03C1/00; G03C1/76; G03C1/795; G03C1/7954; C08J2367/00; C08J2367/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
30 words
A polyester film containing 20% or less by weight of a mixture comprising a white pigment and a pearlescent pigment, wherein said polyester film is a biaxially stretched polyester film.
Claim 2
Dependent Claim
30 words
A polyester film containing 20% or less by weight of a mixture comprising a white pigment and a pearlescent pigment, wherein said polyester film is a biaxially stretched polyester film.
Claim 3
Dependent Claim
18 words
A polyester film as claimed in claim 1, wherein said pearlescent pigment is mica coated with titanium dioxide.
Claim 4
Dependent Claim
35 words
A polyester film as claimed in claim 1, wherein said pearlescent pigment has a tabular form having a plane area of from 10 to 10,000 μm 2 and a thickness of 800 Å or less.
Claim 5
Dependent Claim
21 words
A polyester film as claimed in claim 1, wherein said pearlescent pigment has an optical thickness of 2000 Å or less.
Claim 6
Dependent Claim
15 words
A polyester film as claimed in claim 1, wherein said white pigment is titanium dioxide.
Claim 7
Dependent Claim
21 words
A polyester film as claimed in claim 5, wherein said titanium dioxide has a particle size of 0.5 μm or less.
Claim 8
Dependent Claim
22 words
A polyester film as claimed in claim 1, wherein said mixture is present in an amount of at least 10% by weight.
Claim 9
Dependent Claim
27 words
A polyester film as claimed in claim 1, wherein said pearlescent pigment is present in an amount of 50% or less by weight based on the mixture.
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) | 1993-03-19 | 1993-09-18 | 1994-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-19 | 1997-09-18 | 1998-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-19 | 2001-09-18 | 2002-03-20 | $7700.00 | Window Closed / Lapsed |