US4172440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting monofilament
Assignee: Hoechst AG
•
Filing: 1978-05-23
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Granted: 1979-10-30
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Expires: 1998-05-23
Abstract
Abstract Cutting filaments having a long service life consist of a monofilament of a synthetic polymer into which from 0.3 to 10 percent by weight of an abrasive are incorporated. In the cutting process the abrasive is not ripped off, as it does happen with steel wires bearing the abrasive on their surface, but it is pressed into the monofilament and can be easily recovered therefrom.
Inventors
- 👤 Fritz Schneider
- 👤 Lothar Bayersdorfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:55
CPC Classifications
B; B24; B24D; B24D5/00; B24D5/12; B23; B23D; B23D61/00; B23D61/18; B23D61/185
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
39 words
An elongated cutting filament for sawing hard materials consisting of a monofilament of a synthetic high molecular weight linear polyester and 0.3 to 10% by weight of incorporated abrasive, and the linear polyester having a specific viscosity above 0.7.
Claim 2
Dependent Claim
39 words
An elongated cutting filament for sawing hard materials consisting of a monofilament of a synthetic high molecular weight linear polyester and 0.3 to 10% by weight of incorporated abrasive, and the linear polyester having a specific viscosity above 0.7.
Claim 3
Dependent Claim
19 words
Cutting filament as claimed in claim 1, wherein the monofilament is made of pure or slightly modified polyethylene terephthalate.
Claim 4
Dependent Claim
13 words
Cutting filament as claimed in claim 1, wherein the abrasive is a carbide.
Claim 5
Dependent Claim
13 words
Cutting filament as claimed in claim 3, wherein the abrasive is boron carbide.
Claim 6
Dependent Claim
26 words
Cutting filament as claimed in claim 1, wherein the abrasive particles have a diameter corresponding to less than one half of the diameter of the monofilament.
Claim 7
Dependent Claim
25 words
Cutting filament as claimed in claim 5, wherein the diameter of the abrasive particles is from 0.1 to 0.4 times the diameter of the monofilament.
Claim 8
Dependent Claim
16 words
Cutting filament as claimed in claim 1, having a diameter of from 0.1 to 3 mm.
References Cited (Backward Citations)
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Cited
US3150470A
Cited
US3400494A
Cited
US3522342A
Cited
US3969090A
Cited
US4035961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |