EP1228500A1 - Drumsticks made from liquid crystalline polymer - Google Patents
Drumsticks made from liquid crystalline polymerInfo
- Publication number
- EP1228500A1 EP1228500A1 EP00976821A EP00976821A EP1228500A1 EP 1228500 A1 EP1228500 A1 EP 1228500A1 EP 00976821 A EP00976821 A EP 00976821A EP 00976821 A EP00976821 A EP 00976821A EP 1228500 A1 EP1228500 A1 EP 1228500A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drumstick
- polymer
- liquid crystalline
- lcp
- recited
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920000106 Liquid crystal polymer Polymers 0.000 title claims abstract description 57
- 229920001169 thermoplastic Polymers 0.000 claims description 23
- 239000004416 thermosoftening plastic Substances 0.000 claims description 20
- 229920000642 polymer Polymers 0.000 claims description 17
- 229920001187 thermosetting polymer Polymers 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- 229920002959 polymer blend Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 description 9
- 239000000945 filler Substances 0.000 description 7
- -1 poly(ester-imides) Polymers 0.000 description 7
- 239000002023 wood Substances 0.000 description 7
- 229920000728 polyester Polymers 0.000 description 5
- 239000012744 reinforcing agent Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000003963 antioxidant agent Substances 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 229920002292 Nylon 6 Polymers 0.000 description 2
- 229920002302 Nylon 6,6 Polymers 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920001279 poly(ester amides) Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- 241000723418 Carya Species 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 241000333074 Eucalyptus occidentalis Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- QXJJQWWVWRCVQT-UHFFFAOYSA-K calcium;sodium;phosphate Chemical compound [Na+].[Ca+2].[O-]P([O-])([O-])=O QXJJQWWVWRCVQT-UHFFFAOYSA-K 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000005026 oriented polypropylene Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920000343 polyazomethine Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
- G10D13/00—Percussion musical instruments; Details or accessories therefor
- G10D13/10—Details of, or accessories for, percussion musical instruments
- G10D13/12—Drumsticks; Mallets
Definitions
- Liquid crystalline polymers are useful in drumsticks, the drumstick being completely made from a LCP (plus any fillers, antioxidants, reinforcing agents, pigments dyes or other materials normally found in thermoplastics.), or the drumstick may have one or more LCP inserts.
- Drumsticks for percussionists have traditionally been most often made from wood, usually a hardwood such as American hickory which is straight grained and readily shaped. Usually a rod of the wood is turned to produce the desired shape, the wood is smoothed if necessary, and then coated with a finish. Although wood sticks have been used for many years, and have been found satisfactory, they have some drawbacks, such as a tendency to break along the grain. Therefore improved drumsticks are needed.
- thermoplastics have been thought of for drumsticks, but the stiffness and other properties of most thermoplastics are too low to afford good drumsticks. Recently [see Modern Plastics, vol. 76, No. 10, p. 41 (Oct. 1999)] it has been reported that oriented polymers, such as oriented polypropylene, can be used for drumsticks, but these sticks are relatively expensive to form, requiring one or more orientation steps, then turning (much as in making wood drumsticks) to form the final shape. This manufacturing process does not allow for taking advantage of some of properties of thermoplastics, such as inexpensive and easy formability.
- Drumsticks which are made from LCPs, or which contain LCP inserts, may be simply melt formed, as by injection molding, and have the requisite properties for drumsticks without further processing.
- thermotropic liquid crystalline polymer s
- the invention also includes an embodiment wherein a thermotropic liquid crystalline polymer forms a core overmolded with a second polymer, which may be either a thermoplastic polymer or a thermoset polymer.
- a further embodiment features a thermotropic liquid crystalline polymer overmolded over an isotropic polymer, preferably a thermoplastic core.
- Figure 1 shows a cross section of a drumstick towards the handle end having an LCP core.
- Figure 2 shows a longitudinal cross section of a drumstick having an LCP core and a partial thermoplastic overmolding.
- the drumstick described herein comprises a thermotropic liquid crystalline polymer.
- the drumstick contains at least some LCP, and may contain other materials, such as other thermoplastics.
- the LCP (or other polymer) may be blended with one or more fillers, antioxidants, reinforcing agents, pigments, dyes, or other materials normally found in thermoplastics.
- the other ingredients (if any) in the LCP or other polymer may be used to change the appearance (color for instance) of the drumstick, physical properties, and/or may also affect the acoustical properties of the drumstick.
- Blends of LCPs with other thermoplastics may be also be used in the drumstick in place of "pure" LCP. If such a blend is used, it preferred that the LCP be in a continuous phase.
- an LCP is meant a polymer that is anisotropic when tested in the "TOT
- thermotropic LCP Any thermotropic LCP may be used in this process.
- Suitable thermotropic LCPs are described in U.S. Patents 3,991,013, 3,991,0144,011,199, 4,048,148, 4,075,262, 4,083,829, 4,118,372, 4,122,070, 4,130,545, 4,153,779, 4,159,365, 4,161,470, 4,169,933, 4,184,996, 4,189,549, 4,219,461, 4,232,143, 4,232,144, 4,245,082, 4,256,624, 4,269,965, 4,272,625, 4,370,466, 4,383,105, 4,447,592, 4,522,974, 4,617,369, 4,664,972, 4,684,712, 4,727,129, 4,727,131, 4,728,714, 4,749,769, 4,762,907, 4,778,927, 4,816,555, 4,849,499, 4,851,496, 4,
- thermotropic LCPs include polyesters, poly(ester-amides), poly(ester-imides), and polyazomethines.
- Preferred thermotropic LCPs are polyesters or poly(ester-amides), and it is especially preferred that the polyester or poly(ester-amide) is partly or fully aromatic. If the drumstick is made completely from LCP or an LCP composition
- the drumstick may simply be melt formed in any desired shape or size from the LCP (see for instance H. Mark, et al., Ed., Encyclopedia of Polymer Science and Engineering, Vol. 8, John Wiley & Sons, New York, 1987, p. 102-139, which is included herein by reference).
- the drumstick may be injection molded.
- the LCP contain a filler or reinforcing agent, such as talc, (hollow) glass spheres, or sawdust (the latter may allow the drumstick to look like wood).
- talc talc
- sawdust the latter may allow the drumstick to look like wood.
- the filler or other added ingredients may be chosen to adjust the weight of the stick, by choosing a filler/reinforcing agent with an appropriately low or high density. It is preferred that the filler(s) and other ingredients present (but not including any polymer in an LCP/other polymer blend) be about 5 to about 40 percent by weight of that mixture.
- the LCP may also be present as one or more cores (also called inserts or insert molding) or the outer material of the drumstick. In either case the LCP lends stiffness and other desirable properties to the drumstick, while reducing the amount of (often) relatively expensive LCP in favor of a cheaper thermoplastic. If the LCP is used as a core, it may have a cross section (through at least most of the length) as shown in Figure 1.
- the core, 1, in spline form may be formed by melt forming, for example by extrusion or injection molding, much as a drumstick formed completely from LCP would be formed.
- the core may then be overmolded with another thermoplastic, 2.
- Useful thermoplastics include polyolefins such as polyethylene, polypropylene and polystyrene, polyesters such as poly(ethylene terephthalate) and poly(butylene terephthalate), polyamides such as nylon-6 and nylon-6,6, and other thermoplastics such as polysulfones, polyethers, polyurethanes. Thermosets may also be used.
- Useful thermosets include epoxy, urethane and phenolic resins.
- the LCP core may be overmolded by any usual technique used to overmold thermoplastics or thermosets.
- a (nonLCP) thermoplastic or thermoset or other material may be used for a core, and an LCP overmolded over that core to form the drumstick.
- any normal method of overmolding may be used.
- the LCP have a relatively low melting point so as not to melt or otherwise damage the already existing core.
- the core may be mechanically "locked" to the overmolding by molding into the core shape appropriate angles, overlaps or other discontinuities that cause such mechanical locking.
- the drumstick may also be constructed where part of the exposed surface is an LCP or LCP polymer blend "core", and part of the length of the drumstick is overmolded with another polymer, as is shown in Figure 2.
- Figure 2 which is a longitudinal cross section of a drum stick, the LCP core, 3, extends beyond the overmolded thermoplastic jacket 4, and this core also is the tip of the drumstick.
- the LCP core in Figure 2 may have a cross section similar to that shown in Figure 1 , until the point where it emerges from under 4.
- the LCP and non-LCP polymers in Figure 2 may also be reversed.
- the striking end of the LCP containing drumstick may be covered by another material such as another thermoplastic, for example a polyamide such as nylon-6 or nylon-6,6.
- the striking end of the molded drumstick may be configured so that the added tip may slip over that end and be locked onto the end by mechanical means (so-called snap fit).
- the drumstick may have fastened to it at its end felt or other material which is the surface that actually strikes the drum, as is typical with tympani mallets (sticks).
- the LCP drumstick may also be hollow to some extent (through part of all or the length, especially the hand held section) to adjust the weight of the drumstick, adjust the acoustical response, and/or reduce the amount of relatively expensive LCP used.
- the LCP drumstick may be partially or fully foamed to form a rigid foam. Since LCPs maintain their rigidity in foams, the stick's stiffness is not greatly compromised.
- the cross section of molded LCP drumsticks need not be circular, and contoured and/or curved drumsticks, which may be easier or less tiring to grip, may be readily formed.
- Such drumsticks may be ergonomically superior to the classical straight drumstick, and/or the cross section may be varied to change the balance of the drumstick.
- the outer layer may also be a thermoplastic or thermoset elastomer, preferably a thermoplastic elastomer. The use of an elastomeric outer layer may allow the drumstick to be used with less fatigue by the percussionist, and/or change the acoustical properties of the drumstick.
- thermoplastic elastomer is a block copolymer containing polyester segments and polyether segments, such as is available under the tradename Hytrel® from the DuPont Co., Wilmington, DE, U.S.A. LCP containing drumsticks are durable, and their acoustical properties may sometimes be adjusted.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Laminated Bodies (AREA)
Abstract
Drumsticks made from thermotropic liquid crystalline polymers are readily formed, have good playing characteristics, and are durable.
Description
TITLE
DRUMSTICKS MADE FROM LIQUID CRYSTALLINE POLYMER
FIELD OF THE INVENTION Liquid crystalline polymers (LCPs) are useful in drumsticks, the drumstick being completely made from a LCP (plus any fillers, antioxidants, reinforcing agents, pigments dyes or other materials normally found in thermoplastics.), or the drumstick may have one or more LCP inserts.
TECHNICAL BACKGROUND Drumsticks for percussionists have traditionally been most often made from wood, usually a hardwood such as American hickory which is straight grained and readily shaped. Usually a rod of the wood is turned to produce the desired shape, the wood is smoothed if necessary, and then coated with a finish. Although wood sticks have been used for many years, and have been found satisfactory, they have some drawbacks, such as a tendency to break along the grain. Therefore improved drumsticks are needed.
Thermoplastics have been thought of for drumsticks, but the stiffness and other properties of most thermoplastics are too low to afford good drumsticks. Recently [see Modern Plastics, vol. 76, No. 10, p. 41 (Oct. 1999)] it has been reported that oriented polymers, such as oriented polypropylene, can be used for drumsticks, but these sticks are relatively expensive to form, requiring one or more orientation steps, then turning (much as in making wood drumsticks) to form the final shape. This manufacturing process does not allow for taking advantage of some of properties of thermoplastics, such as inexpensive and easy formability. Drumsticks which are made from LCPs, or which contain LCP inserts, may be simply melt formed, as by injection molding, and have the requisite properties for drumsticks without further processing.
SUMMARY OF THE INVENTION This invention concerns a drumstick, comprising, a one or more thermotropic liquid crystalline polymer (s). The invention also includes an embodiment wherein a thermotropic liquid crystalline polymer forms a core overmolded with a second polymer, which may be either a thermoplastic polymer or a thermoset polymer.
A further embodiment features a thermotropic liquid crystalline polymer overmolded over an isotropic polymer, preferably a thermoplastic core. BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows a cross section of a drumstick towards the handle end having an LCP core.
Figure 2 shows a longitudinal cross section of a drumstick having an LCP core and a partial thermoplastic overmolding.
DETAILS OF THE INVENTION The drumstick described herein comprises a thermotropic liquid crystalline polymer. By comprises is meant that the drumstick contains at least some LCP, and may contain other materials, such as other thermoplastics. The LCP (or other polymer) may be blended with one or more fillers, antioxidants, reinforcing agents, pigments, dyes, or other materials normally found in thermoplastics. The other ingredients (if any) in the LCP or other polymer may be used to change the appearance (color for instance) of the drumstick, physical properties, and/or may also affect the acoustical properties of the drumstick.
Blends of LCPs with other thermoplastics may be also be used in the drumstick in place of "pure" LCP. If such a blend is used, it preferred that the LCP be in a continuous phase. By an LCP is meant a polymer that is anisotropic when tested in the "TOT
Test" described in U.S. Patent 4,118,372. Any thermotropic LCP may be used in this process. Suitable thermotropic LCPs, for example, are described in U.S. Patents 3,991,013, 3,991,0144,011,199, 4,048,148, 4,075,262, 4,083,829, 4,118,372, 4,122,070, 4,130,545, 4,153,779, 4,159,365, 4,161,470, 4,169,933, 4,184,996, 4,189,549, 4,219,461, 4,232,143, 4,232,144, 4,245,082, 4,256,624, 4,269,965, 4,272,625, 4,370,466, 4,383,105, 4,447,592, 4,522,974, 4,617,369, 4,664,972, 4,684,712, 4,727,129, 4,727,131, 4,728,714, 4,749,769, 4,762,907, 4,778,927, 4,816,555, 4,849,499, 4,851,496, 4,851,497, 4,857,626, 4,864,013, 4,868,278, 4,882,410, 4,923,947, 4,999,416, 5,015,721, 5,015,722, 5,025,082, 5,086,158, 5,102,935, 5,110,896, and 5,143,956, and European Patent Application 356,226. Useful thermotropic LCPs include polyesters, poly(ester-amides), poly(ester-imides), and polyazomethines. Preferred thermotropic LCPs are polyesters or poly(ester-amides), and it is especially preferred that the polyester or poly(ester-amide) is partly or fully aromatic. If the drumstick is made completely from LCP or an LCP composition
(meaning the LCP plus any fillers, antioxidants, reinforcing agents, pigments dyes or other materials normally found in thermoplastic.) the drumstick may simply be melt formed in any desired shape or size from the LCP (see for instance H. Mark, et al., Ed., Encyclopedia of Polymer Science and Engineering, Vol. 8, John Wiley & Sons, New York, 1987, p. 102-139, which is included herein by reference). For example, the drumstick may be injection molded. In order to achieve a high degree of stiffness along the length of the drumstick (as it is in a wood drumstick), it is preferred to place the gate of the mold at one end of drumstick cavity,
preferably the end which is the handle (not the end for hitting the drum or other instrument). In this instance it is preferred that the LCP contain a filler or reinforcing agent, such as talc, (hollow) glass spheres, or sawdust (the latter may allow the drumstick to look like wood). The filler or other added ingredients may be chosen to adjust the weight of the stick, by choosing a filler/reinforcing agent with an appropriately low or high density. It is preferred that the filler(s) and other ingredients present (but not including any polymer in an LCP/other polymer blend) be about 5 to about 40 percent by weight of that mixture.
The LCP may also be present as one or more cores (also called inserts or insert molding) or the outer material of the drumstick. In either case the LCP lends stiffness and other desirable properties to the drumstick, while reducing the amount of (often) relatively expensive LCP in favor of a cheaper thermoplastic. If the LCP is used as a core, it may have a cross section (through at least most of the length) as shown in Figure 1. The core, 1, in spline form, may be formed by melt forming, for example by extrusion or injection molding, much as a drumstick formed completely from LCP would be formed. The core may then be overmolded with another thermoplastic, 2. Useful thermoplastics include polyolefins such as polyethylene, polypropylene and polystyrene, polyesters such as poly(ethylene terephthalate) and poly(butylene terephthalate), polyamides such as nylon-6 and nylon-6,6, and other thermoplastics such as polysulfones, polyethers, polyurethanes. Thermosets may also be used. Useful thermosets include epoxy, urethane and phenolic resins. The LCP core may be overmolded by any usual technique used to overmold thermoplastics or thermosets.
Conversely, a (nonLCP) thermoplastic or thermoset or other material may be used for a core, and an LCP overmolded over that core to form the drumstick. Again any normal method of overmolding may be used. In this process it is often preferred that the LCP have a relatively low melting point so as not to melt or otherwise damage the already existing core. Whichever material is used for the core, the core may be mechanically "locked" to the overmolding by molding into the core shape appropriate angles, overlaps or other discontinuities that cause such mechanical locking.
The drumstick may also be constructed where part of the exposed surface is an LCP or LCP polymer blend "core", and part of the length of the drumstick is overmolded with another polymer, as is shown in Figure 2. In Figure 2, which is a longitudinal cross section of a drum stick, the LCP core, 3, extends beyond the overmolded thermoplastic jacket 4, and this core also is the tip of the drumstick. The LCP core in Figure 2 may have a cross section similar to that shown in
Figure 1 , until the point where it emerges from under 4. The LCP and non-LCP polymers in Figure 2 may also be reversed.
As some wooden drumsticks are now made, the striking end of the LCP containing drumstick may be covered by another material such as another thermoplastic, for example a polyamide such as nylon-6 or nylon-6,6. The striking end of the molded drumstick may be configured so that the added tip may slip over that end and be locked onto the end by mechanical means (so-called snap fit). The drumstick may have fastened to it at its end felt or other material which is the surface that actually strikes the drum, as is typical with tympani mallets (sticks).
The LCP drumstick may also be hollow to some extent (through part of all or the length, especially the hand held section) to adjust the weight of the drumstick, adjust the acoustical response, and/or reduce the amount of relatively expensive LCP used. Alternatively for the same reasons the LCP drumstick may be partially or fully foamed to form a rigid foam. Since LCPs maintain their rigidity in foams, the stick's stiffness is not greatly compromised.
Unlike turned drumsticks, such as most wooden drumsticks and oriented polymer drumsticks, the cross section of molded LCP drumsticks need not be circular, and contoured and/or curved drumsticks, which may be easier or less tiring to grip, may be readily formed. Such drumsticks may be ergonomically superior to the classical straight drumstick, and/or the cross section may be varied to change the balance of the drumstick. For a drumstick, such as shown in Figure 2, the outer layer may also be a thermoplastic or thermoset elastomer, preferably a thermoplastic elastomer. The use of an elastomeric outer layer may allow the drumstick to be used with less fatigue by the percussionist, and/or change the acoustical properties of the drumstick. A useful thermoplastic elastomer is a block copolymer containing polyester segments and polyether segments, such as is available under the tradename Hytrel® from the DuPont Co., Wilmington, DE, U.S.A. LCP containing drumsticks are durable, and their acoustical properties may sometimes be adjusted.
Claims
1. A drumstick, comprising or more thermotropic liquid crystalline polymer(s).
2. The drumstick, as recited in Claim 1, where, in said drumstick, the only polymer is said thermotropic liquid crystalline polymer or a polymer blend containing said thermotropic liquid crystalline polymer.
3. The drumstick, as recited in Claim 2, where, in said drumstick, the only polymer is said thermotropic liquid crystalline polymer.
4. The drumstick, as recited in Claim 1, wherein said thermotropic liquid crystalline polymer forms a core overmolded with a second polymer.
5. The drumstick, as recited in Claim 4, wherein said second polymer is a thermoplastic polymer..
6. The drumstick, as recited in Claim 4 wherein said second polymer is a thermoset polymer.
7. The drumstick as recited in Claim 1 wherein said thermotropic liquid crystalline polymer is overmolded over an isotropic polymer core.
8. The drumstick, as recited in Claim 7, wherein said core is a thermoplastic.
9. The drumstick, as recited in Claim 1, which is contoured and/or curved, or has a varying cross section.
10. The drumstick as recited in Claim 1 comprising a blend of one or more liquid crystalline polymers with one or more other thermoplastic polymers.
11. The drumstick as recited in Claim 10 wherein said liquid crystalline polymer is in a continuous phase.
12. The drumstick, as recited in claim 1, which is at least partially hollow, and/or at least part of said liquid crystalline polymer is foamed.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16537299P | 1999-11-12 | 1999-11-12 | |
| US165372P | 1999-11-12 | ||
| PCT/US2000/030208 WO2001035386A1 (en) | 1999-11-12 | 2000-11-02 | Drumsticks made from liquid crystalline polymer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1228500A1 true EP1228500A1 (en) | 2002-08-07 |
| EP1228500B1 EP1228500B1 (en) | 2003-06-11 |
Family
ID=22598618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00976821A Expired - Lifetime EP1228500B1 (en) | 1999-11-12 | 2000-11-02 | Drumsticks made from liquid crystalline polymer |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1228500B1 (en) |
| CA (1) | CA2384743A1 (en) |
| DE (1) | DE60003329T2 (en) |
| WO (1) | WO2001035386A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8188835B2 (en) | 2007-01-24 | 2012-05-29 | Otto Bock Healthcare Products Gmbh | Potentiometer |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI13530Y1 (en) * | 2023-10-24 | 2024-01-16 | Teemu Jauhiainen | Biocomposite drumstick |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3958485A (en) * | 1975-07-07 | 1976-05-25 | Peters Thomas O | Drumstick |
| US4202241A (en) * | 1978-07-03 | 1980-05-13 | Lucas Stephen J | Decorative drumstick system with different appearing inserts |
| US4557176A (en) * | 1985-02-11 | 1985-12-10 | Alan Boturla | Practice drumstick |
| US5170001A (en) * | 1991-06-13 | 1992-12-08 | Amendola William M | Drum stick |
-
2000
- 2000-11-02 WO PCT/US2000/030208 patent/WO2001035386A1/en not_active Ceased
- 2000-11-02 DE DE60003329T patent/DE60003329T2/en not_active Expired - Fee Related
- 2000-11-02 CA CA002384743A patent/CA2384743A1/en not_active Abandoned
- 2000-11-02 EP EP00976821A patent/EP1228500B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0135386A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8188835B2 (en) | 2007-01-24 | 2012-05-29 | Otto Bock Healthcare Products Gmbh | Potentiometer |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1228500B1 (en) | 2003-06-11 |
| DE60003329T2 (en) | 2004-04-29 |
| CA2384743A1 (en) | 2001-05-17 |
| DE60003329D1 (en) | 2003-07-17 |
| WO2001035386A1 (en) | 2001-05-17 |
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