US3800812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental floss and method of making same
Assignee: Pauldan Ind Inc
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Filing: 1972-11-27
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Granted: 1974-04-02
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Expires: 1992-11-27
Abstract
Abstract A polyester elastomer is extruded into a hot and tacky tape having certain tensile properties when cooled, including a high degree of stretchability; and by subsequent stretching of the cooled product, its break strength is substantially increased while it develops desirable elastomeric properties. The tape is cut into strips of dental floss of 1- 1/2 to 10 mils thickness either before or after the stretching, and abrasive particles and a flavoring agent may be incorporated into the tape material or applied to the tape surface.
Inventors
- 👤 P Jaffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:15
CPC Classifications
A; A61; A61C; A61C15/00; A61C15/04; A61C15/041; D; D01; D01D; D01D5/00; D01D5/42; D01D5/426; D01F; D01F6/00; D01F6/78; D01F6/86
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
33 words
A dental floss according to claim 1, in which said modulus is 5,000 to 6,000 psi, the break strength is 11,500 to 14,000 psi, and the ultimate elongation is 275 to 350 percent.
Claim 2
Dependent Claim
61 words
A dental floss according to claim 2, in which said elastomer is a polyester which is a polycondensation product made by condensing at least one aromatic dicarboxylic acid or its ester having a molecular weight below 300 with a polyalkylene ether glycol having a molecular weight of 400 to 6,000 and at least one diol having a molecular weight below 250.
Claim 3
Dependent Claim
17 words
A dental floss according to claim 1, in which said strip has a tack temperature above 200*F.
Claim 4
Dependent Claim
16 words
A dental floss according to claim 1, comprising also a flavoring agent carried by said strip.
Claim 5
Dependent Claim
17 words
A dental floss according to claim 1, comprising also a pulverized abrasive material carried by said strip.
Claim 6
Dependent Claim
31 words
A dental floss according to claim 6, in which said abrasive material has a particle size of 0.1 to 2.0 microns and constitutes about 3 percent by weight of the strip.
Claim 7
Independent Claim
118 words
A method of making dental floss, which comprises extruding a polyester elastomer into a hot and tacky tape which, when cooled, is untacky and has the following tensile properties: a. Modulus of elasticity in tension in the order of 5,300 to 5, 700 psi. b. Break strength in the order of 7,200 to 7,500 psi. c. Ultimate elongation in the order of 750 to 850 percent, cooling the extruded tape, cutting the tape into strips having a thickness of 1- 1/2 to 10 mils, and stretching the material from one of said cooling and cutting steps to increase said break strength to about 11,500 to 14,000 psi, thereby reducing said ultimate elongation to about 300 to 350 percent.
Claim 8
Dependent Claim
69 words
A method according to claim 8, in which said elastomer is a polycondensation product made by condensing at least one aromatic dicarboxylic acid or its ester having a molecular weight below 300 with a polyalkylene ether glycol having a molecular weight of 400 to 6,000 and at least one diol having a molecular weight of 400 to 6,000 and at least one diol having a molecular weight below 250.
Claim 9
Dependent Claim
20 words
A method according to claim 8, comprising also the step of applying a pulverized abrasive material to said polyester elastomer.
Claim 10
Dependent Claim
19 words
A method according to Claim 8, comprising also the step of applying a flavoring agent to said polyester elastomer.
Claim 11
Dependent Claim
20 words
A method according to claim 8, in which said stretching is effected after said cooling but prior to said cutting.
Claim 12
Dependent Claim
14 words
The method of claim 8, in which said stretching is effected after said cutting.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |