Patent US4762373A successfully refreshed from Google Patents.
US4762373A
Expired / Lapsed
US
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Process for rounding the bristle tips of toothbrushes and toothbrushes prepared by this process
Assignee: Blendax GmbH
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Filing: 1986-09-05
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Granted: 1988-08-09
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Expires: 2006-09-05
Abstract
Abstract The present invention relates to a method for rounding the bristle tips of toothbrushes by the action of laser radiation, characterized in that the rounding process is effected in an electrostatic field, thus avoiding the fusion of the individual bristles as well as the formation of a mushroom-like bristle tip.
Inventors
- 👤 Walter Amos
- 👤 Horst Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:57
CPC Classifications
A; A46; A46D; A46D9/00; A46D1/00; A46D1/02; A46D1/0284; A46D9/02; B; B29; B29C; B29C67/00; B29C67/0044; A46B; A46B2200/00; A46B2200/10; A46B2200/1066
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
29 words
A method of rounding bristle tips of a toothbrush by laser radiation which comprises subjecting said bristle tips of said toothbrush to said laser radiation in an electrostatic field.
Claim 2
Independent Claim
29 words
A method of rounding bristle tips of a toothbrush by laser radiation which comprises subjecting said bristle tips of said toothbrush to said laser radiation in an electrostatic field.
Claim 3
Dependent Claim
16 words
A method according to claim 1 wherein said laser radiation is derived from a solid-state laser.
Claim 4
Dependent Claim
17 words
A method according to claim 1 wherein said laser radiation is derived from a CO 2 laser.
Claim 5
Dependent Claim
21 words
A method according to claim 1 wherein said electrostatic field has an intensity of from about 3 kV/cm to 12 kV/cm.
Claim 6
Dependent Claim
26 words
A method according to claim 1 wherein said laser radiation has a laser intensity of from about 5 W/cm 2 to about 150 W/cm 2 .
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) | 1991-08-09 | 1992-02-08 | 1992-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-09 | 1996-02-08 | 1996-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-09 | 2000-02-08 | 2000-08-09 | $7700.00 | Window Closed / Lapsed |