US4655712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental tray light shield
Assignee: Individual
•
Filing: 1985-08-01
•
Granted: 1987-04-07
•
Expires: 2005-08-01
Abstract
Abstract A light shield for protecting dental bonding materials comprises a light filtering coverplate, a stand, and an electronic timer. This device is to be used in a dental operatory to prevent premature curing of the restorative materials after mixing as they await handling and use.
Inventors
- 👤 Theodore P. Croll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:09
CPC Classifications
A; A61; A61C; A61C19/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
61 words
A protective cover for use in the preparation of resin-bonding dental materials, comprising; (a) coverplate constructed of a transparent material which filters out frequencies of light in the 400-530 nanometer range, (b) a stand detachably affixed to said coverplate, said stand having a foot, a vertical support portion and a clamp portion, and (c) a timing device affixed to said coverplate.
Claim 2
Dependent Claim
61 words
A protective cover for use in the preparation of resin-bonding dental materials, comprising; (a) coverplate constructed of a transparent material which filters out frequencies of light in the 400-530 nanometer range, (b) a stand detachably affixed to said coverplate, said stand having a foot, a vertical support portion and a clamp portion, and (c) a timing device affixed to said coverplate.
Claim 3
Dependent Claim
13 words
The protective cover of claim 1 wherein the coverplate is made of plastic.
Claim 4
Dependent Claim
31 words
The protective cover of claim 2 wherein said stand supports the coverplate at an angle so that a wedge-shaped space is created beneath the coverplate to receive materials to be protected.
Claim 5
Dependent Claim
23 words
The protective cover of claim 3 wherein said timing device is an electronic timer with a visual display and start and stop controls.
References Cited (Backward Citations)
US1584105A
Cited
US2816047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |