Patent US4612944A successfully refreshed from Google Patents.
US4612944A
Expired / Lapsed
US
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Comb
Assignee: AMERICAN COMB CORP
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Filing: 1985-02-20
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Granted: 1986-09-23
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Expires: 2005-02-20
Abstract
Abstract A comb for removing lice and nits from the hair is formed by a base and a plurality of teeth extending from said base in substantially the same direction. The longitudinal axis of each tooth is parallel to the longitudinal axis of each other tooth. Each tooth has a polygonal cross section shape such as in the form of a diamond. The cross sectional dimensions of each tooth enlarge from the free end of each tooth toward the base so that the spacing between adjacent teeth narrows toward the base. The facing edges of adjacent teeth interact with each other to capture, in a scissor-like manner, lice and nits therebetween.
Inventors
- 👤 Frank Bachrach
- 👤 James M. Teale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:20
CPC Classifications
A; A45; A45D; A45D24/00; A45D24/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
192 words
A comb for removing lice and nits from hair comprising a base, a plurality of teeth extending substantially in the same direction away from the base, the longitudinal axis of each tooth being parallel to the longitudinal axis of each other tooth and substantially the same length, each said tooth having a polygonal cross sectional shape, the sides of each such cross sectional polygon increasing in length from the free end of each tooth toward the base, so that the spacing between adjacent teeth narrows toward said base, each of the sides of each cross sectional shape of each tooth converging at a rounded top of each tooth, said rounded top having a cord smaller in length than the width of said tooth at any point along its length, said polygonal cross sectional shape being diamond shaped so that said teeth form a four sided pyramid, the side walls of each diamond shaped tooth meeting to form an edge at the intersection thereof, said teeth being arranged on said base so that two opposite edges of each tooth lie in a plane passing through the corresponding opposite edges of each other tooth.
Claim 2
Dependent Claim
192 words
A comb for removing lice and nits from hair comprising a base, a plurality of teeth extending substantially in the same direction away from the base, the longitudinal axis of each tooth being parallel to the longitudinal axis of each other tooth and substantially the same length, each said tooth having a polygonal cross sectional shape, the sides of each such cross sectional polygon increasing in length from the free end of each tooth toward the base, so that the spacing between adjacent teeth narrows toward said base, each of the sides of each cross sectional shape of each tooth converging at a rounded top of each tooth, said rounded top having a cord smaller in length than the width of said tooth at any point along its length, said polygonal cross sectional shape being diamond shaped so that said teeth form a four sided pyramid, the side walls of each diamond shaped tooth meeting to form an edge at the intersection thereof, said teeth being arranged on said base so that two opposite edges of each tooth lie in a plane passing through the corresponding opposite edges of each other tooth.
Claim 3
Dependent Claim
51 words
The comb according to claim 1 wherein facing edges of adjacent diamond shaped teeth which lie in said plane meet at a point approximately twenty percent of the length of said teeth from the base so that at said point the spacing between facing edges of adjacent teeth diminishes to zero.
Claim 4
Dependent Claim
19 words
The comb according to claim 1 wherein side walls of each face of each tooth has a non-smooth surface.
Claim 5
Dependent Claim
26 words
The comb according to claim 1 wherein facing edges of adjacent diamond shaped teeth which lie in said plane are spaced apart at the base thereof.
Claim 6
Dependent Claim
15 words
The comb according to claim 4 wherein said space is no more than 0.002 inches.
Claim 7
Dependent Claim
25 words
The comb according to claim 5 wherein said facing edges are spaced apart at the free end thereof by between 0.005 inches and 0.009 inches.
Claim 8
Dependent Claim
39 words
The comb according to claim 6 wherein said teeth comprise an upper section and a lower section, each section having a diamond cross sectional shape, said sections having their longitudinal axes aligned, said sections meeting at a transition point.
Claim 9
Dependent Claim
30 words
The comb according to claim 7 wherein the slope of the side walls of the upper section is greater than the slope of the side walls of the lower section.
Claim 10
Dependent Claim
35 words
The comb according to claim 8 wherein facing edges of adjacent diamond shaped teeth which lie in said plane and spaced apart at said transition by 0.007 inches and at the base by 0.002 inches.
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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) | 1989-09-22 | 1990-03-24 | 1990-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-22 | 1994-03-24 | 1994-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-22 | 1998-03-24 | 1998-09-23 | $7700.00 | Window Closed / Lapsed |