US3966682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(tetramethylene dibro moterephthalate)
Assignee: Standard Oil Co
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Filing: 1974-06-14
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Granted: 1976-06-29
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Expires: 1994-06-14
Abstract
Abstract This invention relates to poly(tetramethylene 2,5-dibromoterephthalate). More particularly this invention relates to self-extinguishing poly(tetramethylene 2,5-dibromoterephthalate) fibers.
Inventors
- 👤 James P. Nelson
- 👤 Alfred Steitz, Jr., deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:16
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
38 words
A fire-retardant polyester consisting essentially of a dicarboxylic acid component and 1,4-butanediol component wherein the dicarboxylic acid component comprises from 10 to 100 mole percent 2,5-dibromoterephthalic acid moieties and correspondingly 90 to 0 mole percent terephthalic acid moieties.
Claim 2
Dependent Claim
38 words
A fire-retardant polyester consisting essentially of a dicarboxylic acid component and 1,4-butanediol component wherein the dicarboxylic acid component comprises from 10 to 100 mole percent 2,5-dibromoterephthalic acid moieties and correspondingly 90 to 0 mole percent terephthalic acid moieties.
Claim 3
Dependent Claim
31 words
The polyester of claim 1, wherein the 2,5-dibromoterephthalic acid moieties are between about 55 and 100 mole percent and the terephthalic acid moieties are between about 45 and 0 mole percent.
Claim 4
Dependent Claim
11 words
The polyester of claim 2, wherein the polyester is a homopolymer.
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) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |