US4489427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bitewing holder
Assignee: Xerox Corp
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Filing: 1983-12-15
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Granted: 1984-12-18
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Expires: 2003-12-15
Abstract
Abstract A plastic bite holder for securely holding a rigid cassette comprising a photoreceptor and a light proof cover for use as a dental x-ray imaging medium is described. The holder is molded into a single piece of polyethylene and has a tab onto which the patient bites, a backing plate and two gripping members for securely holding the cassette against the backing plate.
Inventors
- 👤 Kenneth L. Allison
- 👤 Helio Gomez
- 👤 Robert Manchego
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:29
CPC Classifications
G; G03; G03B; G03B42/00; G03B42/02; G03B42/04; G03B42/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
240 words
A plastic holder for a rigid bitewing x-ray photoreceptor cassette, the cassette enclosed in a plastic bag, comprising a single unit of plastic formed into a relatively thick rigid backing plate, a relatively thin flexible tab and two gripping members, said tab being attached along the length of one side of said backing plate with the center line of said backing plate lying in the plane of said tab, said tab having its central portion removed to allow a closer masking of the teeth and to minimize x-ray interference, a gripping member attached to each end of said backing plate and positioned to grip one edge of the cassette to hold the cassette against the backing plate in a position perpendicular to the plane of said tab and with the length of the backing plate in parallel with the plane of the cassette, said gripping members being slightly flexible and having surfaces oppposite said backing plate sloping toward said backing plate so that a cassette edge pressed against said sloping surfaces will snap into contact with said backing plate in a position perpendicular to the plane of said tab and with the length of the backing plate in parallel with the plane of the cassette without tearing said plastic bag, and wherein said backing plate has sections of reduced thickness at the points of attachment of said gripping members to allow said gripping members to be flexible at those points.
Claim 2
Dependent Claim
240 words
A plastic holder for a rigid bitewing x-ray photoreceptor cassette, the cassette enclosed in a plastic bag, comprising a single unit of plastic formed into a relatively thick rigid backing plate, a relatively thin flexible tab and two gripping members, said tab being attached along the length of one side of said backing plate with the center line of said backing plate lying in the plane of said tab, said tab having its central portion removed to allow a closer masking of the teeth and to minimize x-ray interference, a gripping member attached to each end of said backing plate and positioned to grip one edge of the cassette to hold the cassette against the backing plate in a position perpendicular to the plane of said tab and with the length of the backing plate in parallel with the plane of the cassette, said gripping members being slightly flexible and having surfaces oppposite said backing plate sloping toward said backing plate so that a cassette edge pressed against said sloping surfaces will snap into contact with said backing plate in a position perpendicular to the plane of said tab and with the length of the backing plate in parallel with the plane of the cassette without tearing said plastic bag, and wherein said backing plate has sections of reduced thickness at the points of attachment of said gripping members to allow said gripping members to be flexible at those points.
References Cited (Backward Citations)
US1706117A
Cited
US2075491A
Cited
US2005993A
Cited
US2240336A
Cited
US3356845A
Cited
US3936643A
Cited
US4075494A
Cited
US4251732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |