Patent CA669449A successfully refreshed from Google Patents.
Patent US4501796A successfully refreshed from Google Patents.
US4501796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiographic intensifying screen
Assignee: Fujifilm Holdings Corp
•
Filing: 1983-07-06
•
Granted: 1985-02-26
•
Expires: 2003-07-06
Abstract
Abstract A radiographic intensifying screen comprising a support and at least one phosphor layer provided thereonto which comprises a binder and a phosphor dispersed therein, wherein the support is a resin film containing a white pigment.
Inventors
- 👤 Akira Kitada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:11
CPC Classifications
G; G21; G21K; G21K4/00; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/266; Y10T428/27; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
74 words
A radiographic intensifying screen comprising a support and at least one phosphor layer provided thereonto wherein said at least one phosphor layer comprises a binder and phosphor particles dispersed therein, and wherein said support is a resin film containing a powdery white pigment in an amount ranging from 0.1 to 10.0 mg/cm 2 , based on the surface area of the support, and said support has a thickness ranging from 100 to 500 μm.
Claim 2
Dependent Claim
74 words
A radiographic intensifying screen comprising a support and at least one phosphor layer provided thereonto wherein said at least one phosphor layer comprises a binder and phosphor particles dispersed therein, and wherein said support is a resin film containing a powdery white pigment in an amount ranging from 0.1 to 10.0 mg/cm 2 , based on the surface area of the support, and said support has a thickness ranging from 100 to 500 μm.
Claim 3
Dependent Claim
37 words
The radiographic intensifying screen as claimed in claim 1, in which the content of the powdery white pigment is in the range of from 0.5 to 5.0 mg/cm 2 based on the surface area of the support.
Claim 4
Dependent Claim
23 words
The radiographic intensifying screen as claimed in claim 1, in which the support is a polyethylene terephthalate film containing a powdery white pigment.
Claim 5
Dependent Claim
21 words
The radiographic intensifying screen as claimed in claim 1 or claim 3, in which the powdery white pigment is titanium dioxide.
Claim 6
Dependent Claim
34 words
The radiographic intensifying screen as claimed in claim 4, in which the titanium dioxide is anatase-type titanium dioxide, and the phosphor particles emit light in both the near ultraviolet region and the visible region.
Claim 7
Dependent Claim
23 words
The radiographic intensifying screen as claimed in claim 5, in which the phosphor particles are divalent europium activated alkaline earth metal fluorohalide phosphor.
References Cited (Backward Citations)
US4415471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-26 | 1988-08-27 | 1989-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-26 | 1992-08-27 | 1993-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-26 | 1996-08-27 | 1997-02-26 | $7700.00 | Window Closed / Lapsed |