US4188960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibers filter rods and other nonwoven articles made from poly(1,2-propylene terephthalate) copolyesters of terephthalic acid, 1,2-propylene glycol and ethylene glycol
Assignee: Eastman Chemical Co
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Filing: 1978-12-08
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Granted: 1980-02-19
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Expires: 1998-12-08
Abstract
Abstract This invention concerns fibers of amorphous polyesters of terephthalic acid or an ester forming derivative thereof and from about 60 mole percent to 100 mole percent 1,2-propylene glycol and from 0 to about 40 mole percent ethylene glycol. These fibers are useful for the production of bonded coherent cigarette filters, nonwoven fabrics and the like.
Inventors
- 👤 Gerald P. Morie
- 👤 Cephas H. Sloan
- 👤 Winston J. Jackson, Jr.
- 👤 Herbert F. Kuhfuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:02
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; A; A24; A24D; A24D3/00; A24D3/06; A24D3/08; B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08G63/183; D01; D01F; D01F6/00; D01F6/78; D01F6/84; B01D2239/00; B01D2239/04; B01D2239/0471; B01D2239/06; B01D2239/0604; B01D2239/0622; B01D2239/08; B01D2239/086; B01D2239/12; B01D2239/1291
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
96 words
A tobacco smoke filter rod of a continuous melt blown web of a fiber of a polyester of terephthalic acid or an ester forming derivative thereof and a glycol of from about 60 mole percent to 100 mole percent 1,2-propylene glycol and from 0 to about 40 mole percent ethylene glycol; said polyester having an inherent viscosity of at least about 0.35 in a 60/40 parts by weight solution of phenol/tetrachloroethane at 25° C. at a concentration of 0.5 gram of polyester in 100 ml. of said solvent, and a Tg of at least 80° C.
Claim 2
Dependent Claim
96 words
A tobacco smoke filter rod of a continuous melt blown web of a fiber of a polyester of terephthalic acid or an ester forming derivative thereof and a glycol of from about 60 mole percent to 100 mole percent 1,2-propylene glycol and from 0 to about 40 mole percent ethylene glycol; said polyester having an inherent viscosity of at least about 0.35 in a 60/40 parts by weight solution of phenol/tetrachloroethane at 25° C. at a concentration of 0.5 gram of polyester in 100 ml. of said solvent, and a Tg of at least 80° C.
Claim 3
Dependent Claim
35 words
The tobacco smoke filter rod of the continuous melt blown web of claim 1 wherein the inherent viscosity of the polyester is at least about 0.5 and the Tg is at least about 85° C.
Claim 4
Dependent Claim
92 words
A plasticizer bondable tobacco smoke filter tow of a fiber of a polyester of terephthalic acid or an ester forming derivative thereof and a glycol of from about 60 mole percent to 100 mole percent 1,2-propylene glycol and from 0 to about 40 mole percent ethylene glycol; said polyester having an inherent viscosity of at least about 0.35 in a 60/40 parts by weight solution of phenol/tetrachloroethane at 25° C. at a concentration of 0.5 gram of polyester in 100 ml. of said solvent, and a Tg of at least 80° C.
Claim 5
Dependent Claim
92 words
A plasticizer bondable tobacco smoke filter tow of a fiber of a polyester of terephthalic acid or an ester forming derivative thereof and a glycol of from about 60 mole percent to 100 mole percent 1,2-propylene glycol and from 0 to about 40 mole percent ethylene glycol; said polyester having an inherent viscosity of at least about 0.35 in a 60/40 parts by weight solution of phenol/tetrachloroethane at 25° C. at a concentration of 0.5 gram of polyester in 100 ml. of said solvent, and a Tg of at least 80° C.
Claim 6
Dependent Claim
34 words
The plasticizer bondable tobacco smoke filter tow of the filter of claim 3 wherein the inherent viscosity of the polyester is at least about 0.5 and the Tg is at least about 85° C.
Claim 7
Dependent Claim
16 words
A plasticizer bonded tobacco smoke filter rod of the tobacco smoke filter tow of claim 4.
Claim 8
Dependent Claim
25 words
The plasticizer bonded tobacco smoke filter rod of claim 5 wherein the plasticizer is selected from triethylene glycol diacetate, and glycerol triacetate or mixtures thereof.
Claim 9
Dependent Claim
13 words
A steam-bonded non-wrapped rod of the tobacco smoke filter tow of claim 4.
Claim 10
Dependent Claim
13 words
A molded tobacco smoke filter rod of the non-wrapped rod of claim 7.
Claim 11
Dependent Claim
14 words
A hot air-bonded non-wrapped rod of the tobacco smoke filter tow of claim 4.
Claim 12
Dependent Claim
16 words
A plasticizer bonded tobacco smoke filter rod of the tobacco smoke filter tow of claim 3.
Claim 13
Dependent Claim
23 words
The tobacco smoke filter rod of claim 11 wherein the plasticizer is selected from triethylene glycol diacetate and glycerol triacetate or mixtures thereof.
Claim 14
Dependent Claim
13 words
A steam-bonded non-wrapped rod of the tobacco smoke filter tow of claim 3.
Claim 15
Dependent Claim
13 words
A molded tobacco smoke filter rod of the non-wrapped rod of claim 12.
Claim 16
Dependent Claim
14 words
A hot air-bonded non-wrapped rod of the tobacco smoke filter tow of claim 3.
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) | 1983-02-18 | 1983-08-20 | 1984-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-18 | 1987-08-20 | 1988-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-18 | 1991-08-20 | 1992-02-19 | $7700.00 | Window Closed / Lapsed |