Patent US4800608A successfully refreshed from Google Patents.
US4800608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toothbrush
Assignee: Individual
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Filing: 1987-10-05
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Granted: 1989-01-31
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Expires: 2007-10-05
Abstract
Abstract An improved toothbrush design incorporating a bristle head including a fixed obtuse angle. This toothbrush is designed to be the sole implement needed for dental hygiene. The angled bristle head provides superior cleansing of the lingual, buccal, embrasure, and distal aspects of the teeth and gums.
Inventors
- 👤 John R. Key
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:46
CPC Classifications
A; A46; A46B; A46B9/00; A46B9/02; A46B9/04; A46B9/045; A46B2200/00; A46B2200/10; A46B2200/1066
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
328 words
A new and improved toothbrush providing optimum cleaning performance for buccal, lingual and distal surfaces of the teeth and gums and optimum cleaning performance for the embrasure areas of the mouth comprising in combination, a plurality of bristles of even length and in rows; an angled head for holding said bristles, a handle and a neck connecting said handle to said angled head; wherein, (a) said angled bristle head is of constant width and comprises a distal segment, and a second segment intermediate to said distal segment and said neck; (b) said distal segment fixed to said intermediate segment of an obtuse angle within the range of 115° and 155° relative to said intermediate segment; (c) said neck is of narrower width and smaller cross-section than said bristle head, and at one end is made contiguous with the proximate end of said intermediate segment of said angled bristle head, and at the other end is made contiguous with said handle which is of larger cross-section than said bristle head; (d) said two segments of said bristle head are provided on the inside, facing surfaces of said segments with plane surfaces for the attachment of said bristles; (e) said bristles are perpendicular relative to the plane surfaces where attached to the plane surfaces formed on the inside of said bristle head segments, so that all bristles attached to a given segment of said bristles head are parallel and so that bristles mounted to the distal segment of the angled bristle head are facing the bristles mounted to the intermediate segment of the angled bristle head and so that the bristle ends of the bristles attached to the distal segment forms a plane facing and intersecting the plane of bristle ends formed by the bristles attached to the intermediate segment; and, (f) said handle has a longitudinally straight axis and is connected to said neck at an obtuse angle within the range of 115° and 155° relative to said neck.
Claim 2
Dependent Claim
328 words
A new and improved toothbrush providing optimum cleaning performance for buccal, lingual and distal surfaces of the teeth and gums and optimum cleaning performance for the embrasure areas of the mouth comprising in combination, a plurality of bristles of even length and in rows; an angled head for holding said bristles, a handle and a neck connecting said handle to said angled head; wherein, (a) said angled bristle head is of constant width and comprises a distal segment, and a second segment intermediate to said distal segment and said neck; (b) said distal segment fixed to said intermediate segment of an obtuse angle within the range of 115° and 155° relative to said intermediate segment; (c) said neck is of narrower width and smaller cross-section than said bristle head, and at one end is made contiguous with the proximate end of said intermediate segment of said angled bristle head, and at the other end is made contiguous with said handle which is of larger cross-section than said bristle head; (d) said two segments of said bristle head are provided on the inside, facing surfaces of said segments with plane surfaces for the attachment of said bristles; (e) said bristles are perpendicular relative to the plane surfaces where attached to the plane surfaces formed on the inside of said bristle head segments, so that all bristles attached to a given segment of said bristles head are parallel and so that bristles mounted to the distal segment of the angled bristle head are facing the bristles mounted to the intermediate segment of the angled bristle head and so that the bristle ends of the bristles attached to the distal segment forms a plane facing and intersecting the plane of bristle ends formed by the bristles attached to the intermediate segment; and, (f) said handle has a longitudinally straight axis and is connected to said neck at an obtuse angle within the range of 115° and 155° relative to said neck.
Claim 3
Dependent Claim
32 words
A toothbrush of claim 1 wherein the obtuse angle of the neck to handle connection faces the direction opposite to the direction faced by the angle included in the angled bristle head.
Claim 4
Dependent Claim
28 words
The toothbrush of claim 1 wherein the obtuse angle of the neck to handle connection and the angle included in the angle bristle head face the same direction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |