Patent US4010509A successfully refreshed from Google Patents.
US4010509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double sulcus toothbrush
Assignee: Individual
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Filing: 1976-01-09
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Granted: 1977-03-08
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Expires: 1996-01-09
Abstract
Abstract The invention is a double sulcus toothbrush having two groups of sulcus bristles which diverge at an angle relative to one another laterally of the toothbrush so that these groups may bear against the upper and lower teeth, inside or out, with the bristles entering the sulci at an angle appropriate for their cleansing, these bristles being optionally forwardly inclined, cut at a taper to facilitate brushing of the rear sulci or separated by a group of conventional bristles which are shorter than the sulcus bristles for brushing the crowns of the teeth.
Inventors
- 👤 Frederic G. Huish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:28
CPC Classifications
A; A46; A46B; A46B9/00; A46B9/02; A46B9/04; A46B9/045; A46B2200/00; A46B2200/10; A46B2200/1066
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A double-acting sulcus toothbrush comprising: a. an elongated handle; b. a head integral with one end of said handle and having a forward face; c. an elongated, central bristle group longitudinally extended on said face; d. two longitudinally extended elongated sulcus bristle groups embedded in the forwarded face of said head on opposite sides of said central bristle group the bristles of said sulcus bristle groups being mutually divergent and having ends extending forwardly beyond the bristles of said central bristle group. e. the forward face of said head having a flat central area and two rearwardly sloped lateral shoulders; f. said central bristles being embedded in said central area and said sulcus bristles being embedded generally orthogonally into said shoulders, said flat central area being rearwardly recessed relative to said shoulders.
Claim 2
Dependent Claim
132 words
A double-acting sulcus toothbrush comprising: a. an elongated handle; b. a head integral with one end of said handle and having a forward face; c. an elongated, central bristle group longitudinally extended on said face; d. two longitudinally extended elongated sulcus bristle groups embedded in the forwarded face of said head on opposite sides of said central bristle group the bristles of said sulcus bristle groups being mutually divergent and having ends extending forwardly beyond the bristles of said central bristle group. e. the forward face of said head having a flat central area and two rearwardly sloped lateral shoulders; f. said central bristles being embedded in said central area and said sulcus bristles being embedded generally orthogonally into said shoulders, said flat central area being rearwardly recessed relative to said shoulders.
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) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |