US4232144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester which exhibits anisotropy in the melt containing p-oxybenzoyl units and 4-oxy-3'-carbonylbenzophenone units or methyl and chloro derivatives of said units
Assignee: EIDP Inc
•
Filing: 1979-09-17
•
Granted: 1980-11-04
•
Expires: 1999-09-17
Abstract
Abstract Fiber-forming aromatic polyester consisting essentially of p-oxybenzoyl units or the 3-methyl or 3-chloro derivatives thereof, 4-oxy-3'-carboxybenzophenone units or the 3-methyl or 3-chloro derivatives thereof, 1,4-dioxyphenylene and terephthaloyl units.
Inventors
- 👤 Robert S. Irwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:30
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/02; C08G63/60; C08G63/605
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
68 words
Fiber-forming copolyesters consisting essentially of Units I, II, III and IV having the structural formulas: ##STR2## where X and R are independently hydrogen, methyl- or chloro-, in the proportions of about 56-70 mol % of Unit I, about 10-20 mol % of Unit II, from 7 to about 12 mol % of Unit III and an amount of Unit IV equivalent on a molar basis to Unit III.
Claim 2
Dependent Claim
68 words
Fiber-forming copolyesters consisting essentially of Units I, II, III and IV having the structural formulas: ##STR2## where X and R are independently hydrogen, methyl- or chloro-, in the proportions of about 56-70 mol % of Unit I, about 10-20 mol % of Unit II, from 7 to about 12 mol % of Unit III and an amount of Unit IV equivalent on a molar basis to Unit III.
Claim 3
Dependent Claim
7 words
A filament of copolyester of claim 1.
Claim 4
Dependent Claim
20 words
A fiber-forming copolyester according to claim 1 wherein Unit I is present in an amount of about 60 mol %.
Claim 5
Dependent Claim
8 words
A filament of a copolyester of claim 3.
Claim 6
Dependent Claim
12 words
A fiber-forming copolyester according to claim 1 wherein Unit I is p-oxybenzoyl.
Claim 7
Dependent Claim
12 words
A fiber-forming copolyester, according to claim 1 wherein Unit I is 3-chloro-p-oxybenzoyl.
Claim 8
Dependent Claim
12 words
A fiber-forming copolyester according to claim 1 wherein Unit I is 3-methyl-p-oxybenzoyl.
Claim 9
Dependent Claim
12 words
A fiber-forming copolyester according to claim 1 wherein Unit II is 3-chloro-4-oxy-3'-carbonylbenzophenone.
Claim 10
Dependent Claim
12 words
A fiber-forming copolyester according to claim 1 wherein Unit II is 3-methyl-4-oxy-3'-carbonylbenzophenone.
Claim 11
Dependent Claim
12 words
A fiber-forming copolyester according to claim 1 wherein Unit II is 4-oxy-3'-m-carboxybenzophenone.
Claim 12
Dependent Claim
8 words
A filament of the copolyester of claim 5.
Claim 13
Dependent Claim
8 words
A filament of the copolyester of claim 6.
Claim 14
Dependent Claim
8 words
A filament of the copolyester of claim 7.
Claim 15
Dependent Claim
8 words
A filament of the copolyester of claim 8.
Claim 16
Dependent Claim
8 words
A filament of the copolyester of claim 9.
Claim 17
Dependent Claim
8 words
A filament of the copolyester of claim 10.
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) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |