US3887521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-stabilized synthetic linear polyesters and shaped structures made therefrom
Assignee: Hoechst AG
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Filing: 1974-05-10
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Granted: 1975-06-03
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Expires: 1994-05-10
Abstract
Abstract Light-stabilized synthetic linear, fiber- and film-forming polyesters are obtained by incorporating into the macromolecules composed of dicarboxylic acid and diol moieties about 0.1 to 5 mole percent of structural units of the formula IN WHICH X stands for the group WHEREIN R1, R2 and R3 each are hydrogen or an alkyl radical having from 1 to 4 carbon atoms.
Inventors
- 👤 Erich Blocker
- 👤 Walter Rupp
- 👤 Franz Jakob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:19
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/60
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
36 words
SYNTHETIC LINEAR, FIBER- AND FILM-FORMING POLYESTER THE MACROMOLECULES OF WHICH ARE COMPOSED OF DICARBOXYLIC ACID AND DIOL MOIETIES, WHEREIN ABOUT 0.1 TO 5 MOLE % OF THE DICARBOXYLIC ACID MOIETIES ARE STRUCTURAL UNITS OF THE FORMULA
Claim 2
Dependent Claim
36 words
SYNTHETIC LINEAR, FIBER- AND FILM-FORMING POLYESTER THE MACROMOLECULES OF WHICH ARE COMPOSED OF DICARBOXYLIC ACID AND DIOL MOIETIES, WHEREIN ABOUT 0.1 TO 5 MOLE % OF THE DICARBOXYLIC ACID MOIETIES ARE STRUCTURAL UNITS OF THE FORMULA
Claim 3
Dependent Claim
36 words
Synthetic linear, fiber- and film-forming polyester the macromolecules of which are composed of dicarboxylic acid and diol moieties, wherein about 0.1 to 5 mole % of the dicarboxylic acid moieties are structural units of the formula
Claim 4
Dependent Claim
36 words
Synthetic linear, fiber- and film-forming polyester the macromolecules of which are composed of dicarboxylic acid and diol moieties, wherein about 0.1 to 5 mole % of the dicarboxylic acid moieties are structural units of the formula
Claim 5
Dependent Claim
22 words
A synthetic polyester as claimed in claim 1 containing about 0.5 to 3 mole percent of structural units of the defined formula.
Claim 6
Dependent Claim
34 words
A synthetic polyester as claimed in claim 1, wherein in the structural units of the defined formula R1 represents hydrogen and R2 and R3 each are alkyl of from 1 to 4 carbon atoms.
Claim 7
Dependent Claim
30 words
A synthetic polyester as claimed in claim 1, containing at least 90 percent of terephthalic acid units and at least 90 mole percent of ethylene glycol or butYlene glycol units.
Claim 8
Dependent Claim
32 words
A synthetic linear polyester as claimed in claim 3, containing at least 90 mole percent of terephthalic acid units and at least 90 mole percent of ethylene glycol or butylene glycol units.
Claim 9
Dependent Claim
9 words
Filaments, made from the polyester claimed in claim 1.
Claim 10
Dependent Claim
10 words
Shaped articles made from the polyesters claimed in claim 1.
References Cited (Backward Citations)
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US3386952A
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US3381058A
Cited
US3560439A
Cited
US3549593A
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US3635899A
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US3776887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |