Patent US1768024A successfully refreshed from Google Patents.
US4347349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic polyester and filaments
Assignee: EIDP Inc
•
Filing: 1980-07-28
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Granted: 1982-08-31
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Expires: 2000-07-28
Abstract
Abstract Polyesters of fiber-forming molecular weight consisting esssentially of methyl or chloro-1,4-dioxyphenylene units, terephthaloyl units and small amounts of 6-oxy-2-naphthoyl and units from other difunctional aromatic polyester-forming reactants.
Inventors
- 👤 Roger K. Siemionko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:08
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/78; D01F6/84; C; C08; C08G; C08G63/00; C08G63/02; C08G63/60; C08G63/605; C08G63/68; C08G63/682
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
91 words
Polyesters of fiber-forming molecular weight consisting essentially of units having the following structural formulas: ##STR2## wherein X is chloro- or methyl, and wherein unit 4a is a dioxy unit derived from hydroquinone, resorcinol, 2,5- or 2,6-dichlorohydroquinone, and unit IVb is isophthaloyl, in the proportions of about 75 to 95 mol % of Units I and II and about 5-25 mol % of Units III and IV of which at least 5 mol % is Unit III, the dioxy units and the dicarbonyl units in the polymer are substantially equimolar in quantity.
Claim 2
Dependent Claim
91 words
Polyesters of fiber-forming molecular weight consisting essentially of units having the following structural formulas: ##STR2## wherein X is chloro- or methyl, and wherein unit 4a is a dioxy unit derived from hydroquinone, resorcinol, 2,5- or 2,6-dichlorohydroquinone, and unit IVb is isophthaloyl, in the proportions of about 75 to 95 mol % of Units I and II and about 5-25 mol % of Units III and IV of which at least 5 mol % is Unit III, the dioxy units and the dicarbonyl units in the polymer are substantially equimolar in quantity.
Claim 3
Dependent Claim
8 words
A filament of a polyester of claim 1.
Claim 4
Dependent Claim
15 words
A fiber-forming polyester according to claim 1 consisting essentially of Units I, II and III.
Claim 5
Dependent Claim
8 words
A filament of the polyester of claim 3.
Claim 6
Dependent Claim
12 words
A fiber-forming polyester according to claim 1 wherein Unit IV is 1,3-dioxyphenylene.
Claim 7
Dependent Claim
8 words
A filament of the polyester of claim 5.
Claim 8
Dependent Claim
12 words
A fiber-forming polyester according to claim 1 wherein Unit IV is isophthaloyl.
Claim 9
Dependent Claim
8 words
A filament of the polyester of claim 7.
Claim 10
Dependent Claim
12 words
A fiber-forming polyester according to claim 1 wherein Unit IV is 1,4-dioxyphenylene.
Claim 11
Dependent Claim
8 words
A filament of the polyester of claim 9.
Claim 12
Dependent Claim
11 words
A fiber-forming polyester according to claim 1 wherein X is chloro-.
Claim 13
Dependent Claim
8 words
A filament of the polyester of claim 11.
References Cited (Backward Citations)
US4219461A
Cited
US4256624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |