US4463470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toothbrush
Assignee: WILLIS BRAIN D PROFESSIONAL Corp
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Filing: 1983-03-17
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Granted: 1984-08-07
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Expires: 2003-03-17
Abstract
Abstract A pair of complementary right and left-handed toothbrushes in which each brush has a handle, a brush head formed integrally with the handle portion, a first bend in such handle, formed in a transverse plane, so that the head is angled outwardly with respect to the handle, an axial twist in the handle between the bend and the head so that the head is rotated to lie in a plane displaced angularly outward, and a second bend in the handle between the twist and the head, lying in a plane transversely of the head. The said first bend, axial twist and second bend spatially orientate the brush head into the desired position relative to the handle.
Inventors
- 👤 Brian D. Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:22
CPC Classifications
A; A46; A46B; A46B9/00; A46B9/02; A46B9/04; A46B2200/00; A46B2200/10; A46B2200/1066
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
313 words
A pair of separate right and left handed toothbrushes wherein each brush comprises; a handle portion defining front and rear surfaces, and inner and outer side edges, and a transverse plane and a free, unencumbered end; a neck portion extending from the other end of said handle portion; a brush head portion formed on said neck portion, and having a transverse plane; a first bend formed between such handle and such neck, said first bend portion being formed in said transverse plane, whereby said neck portion is angled outwardly with respect to said outer edge of said handle; an axial twist in said neck between said first bend portion and said head, whereby said head portion is rotated to lie in a plane disposed angularly outwardly; a second bend between said neck portion and said head, said second bend lying in the transverse plane of said head, whereby the axis of said head is aligned parallel to the axis of said handle, and wherein said toothbrush is formed with said first bend angled to the right and said second bend to the left, and wherein the other said toothbrush is formed with the first bend angled to the left and the second bend to the right, and wherein said one toothbrush has an axial twist to the right, and wherein said other toothbrush has an axial twist to the left, whereby said one toothbrush may be used, in the right hand for cleaning the following surfaces: right mandibular occlusal, right mandibular buccal, right maxillary buccal, left mandibular lingual and the upper incisors, and whereby the other said toothbrush may be used in the right hand for cleaning the following tooth surfaces: left mandibular occlusal, left mandibular buccal, left maxillary palatal, right maxillary occlusal right maxillary buccal, right mandibular lingual and the lower incisors, said brushes being used separately and independently of one another.
Claim 2
Dependent Claim
313 words
A pair of separate right and left handed toothbrushes wherein each brush comprises; a handle portion defining front and rear surfaces, and inner and outer side edges, and a transverse plane and a free, unencumbered end; a neck portion extending from the other end of said handle portion; a brush head portion formed on said neck portion, and having a transverse plane; a first bend formed between such handle and such neck, said first bend portion being formed in said transverse plane, whereby said neck portion is angled outwardly with respect to said outer edge of said handle; an axial twist in said neck between said first bend portion and said head, whereby said head portion is rotated to lie in a plane disposed angularly outwardly; a second bend between said neck portion and said head, said second bend lying in the transverse plane of said head, whereby the axis of said head is aligned parallel to the axis of said handle, and wherein said toothbrush is formed with said first bend angled to the right and said second bend to the left, and wherein the other said toothbrush is formed with the first bend angled to the left and the second bend to the right, and wherein said one toothbrush has an axial twist to the right, and wherein said other toothbrush has an axial twist to the left, whereby said one toothbrush may be used, in the right hand for cleaning the following surfaces: right mandibular occlusal, right mandibular buccal, right maxillary buccal, left mandibular lingual and the upper incisors, and whereby the other said toothbrush may be used in the right hand for cleaning the following tooth surfaces: left mandibular occlusal, left mandibular buccal, left maxillary palatal, right maxillary occlusal right maxillary buccal, right mandibular lingual and the lower incisors, said brushes being used separately and independently of one another.
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) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |