Patent US5425637A successfully refreshed from Google Patents.
US5425637A
Expired / Lapsed
US
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Method and apparatus for preventing a back flow of oral contaminants in a low volume suction line of a dental saliva ejector
Assignee: White Shield Inc
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Filing: 1994-03-31
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Granted: 1995-06-20
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Expires: 2014-03-31
Abstract
Abstract A method of preventing a back flow of oral contaminants in a low volume suction line of a dental saliva ejector is described. This method consists of the single step of placing a vacuum release aperture through a tubular sidewall of a saliva ejector tip. The aperture is spaced from a mouthpiece of the saliva ejector tip such that when the mouthpiece is inserted into a patient's mouth, the patient's mouth will not block the aperture.
Inventors
- 👤 Ronald L. S. Whitehouse
- 👤 Connie Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:33
CPC Classifications
A; A61; A61C; A61C17/00; A61C17/06; A61C17/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
A method of preventing a back flow of oral contaminants in a suction line of a dental saliva ejector, comprising the steps of: placing onto the suction line a disposable saliva ejector tip having: a. a disposable tubular body having a first end, a second end, and a tubular sidewall extending between the first end and the second end thereby defining a single central passage; b. a mouthpiece at the second end; and c. at least one unregulated vacuum release aperture through the tubular sidewall in direct communication with the single central passage, the aperture being spaced from the mouthpiece such that when the mouthpiece is inserted into a patient's mouth, the patient's mouth will not block the aperture; and taking preventative measures to ensure that the vacuum release aperture does not become blocked during use.
Claim 2
Independent Claim
136 words
A method of preventing a back flow of oral contaminants in a suction line of a dental saliva ejector, comprising the steps of: placing onto the suction line a disposable saliva ejector tip having: a. a disposable tubular body having a first end, a second end, and a tubular sidewall extending between the first end and the second end thereby defining a single central passage; b. a mouthpiece at the second end; and c. at least one unregulated vacuum release aperture through the tubular sidewall in direct communication with the single central passage, the aperture being spaced from the mouthpiece such that when the mouthpiece is inserted into a patient's mouth, the patient's mouth will not block the aperture; and taking preventative measures to ensure that the vacuum release aperture does not become blocked during use.
Claim 3
Dependent Claim
100 words
In combination: a low volume dental office suction line; and a saliva ejector tip, comprising: a. a disposable tubular body having a first end, a second end, and a tubular sidewall extending between the first end and the second end thereby defining a single central passage; b. a mouthpiece at the second end; and c. at least one unregulated vacuum release aperture through the tubular sidewall in direct communication with the single central passage, the aperture being spaced from the mouthpiece such that when the mouthpiece is inserted into a patient's mouth, the patient's mouth will not block the aperture.
Claim 4
Dependent Claim
100 words
In combination: a low volume dental office suction line; and a saliva ejector tip, comprising: a. a disposable tubular body having a first end, a second end, and a tubular sidewall extending between the first end and the second end thereby defining a single central passage; b. a mouthpiece at the second end; and c. at least one unregulated vacuum release aperture through the tubular sidewall in direct communication with the single central passage, the aperture being spaced from the mouthpiece such that when the mouthpiece is inserted into a patient's mouth, the patient's mouth will not block the aperture.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-06-19 | 1998-12-19 | 1999-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-19 | 2002-12-19 | 2003-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-19 | 2006-12-19 | 2007-06-20 | $7700.00 | Window Closed / Lapsed |