US3770956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray measuring grid
Assignee: Buckbee Mears Co
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Filing: 1971-12-30
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Granted: 1973-11-06
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Expires: 1991-12-30
Abstract
Abstract A precision metal grid encapsulated in plastic for blocking Xrays in a coordinate pattern during exposure of X-ray film.
Inventors
- 👤 E Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:59
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/10; G03; G03B; G03B42/00; G03B42/02; G03B42/04; G03B42/047; G03F; G03F7/00; G03F7/0005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
For use as a measuring grid in X-ray technology: a set of coplanar electrodeposited equally spaced thin cross-lines of X-ray opaque material; two layers of X-ray transparent material for encapsulating said set of cross-lines therebetween; and a handle attached to at least one of the encapsulating layers for moving the grid to position it with respect to the item being X-rayed.
Claim 2
Dependent Claim
61 words
For use as a measuring grid in X-ray technology: a set of coplanar electrodeposited equally spaced thin cross-lines of X-ray opaque material; two layers of X-ray transparent material for encapsulating said set of cross-lines therebetween; and a handle attached to at least one of the encapsulating layers for moving the grid to position it with respect to the item being X-rayed.
References Cited (Backward Citations)
US2141193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |