US3883611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyester(ethylene terephthalate/tetramethylene dibromoterephthalate) a new block polymer
Assignee: Standard Oil Co
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Filing: 1972-06-15
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Granted: 1975-05-13
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Expires: 1992-06-15
Abstract
Abstract A novel fire retardant block copolyester, poly(ethylene terephthalate/tetramethylene dibromoterephthalate), is prepared by reacting poly(ethylene terephthalate) and poly(tetramethylene dibromoterephthalate) to form the new block copolyester. Said copolyester finds commercial use as molding compounds for use in the construction, automobile, home appliances, and aircraft industries or as textile products for use as fibers or fabrics.
Inventors
- 👤 James P Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:14
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
THE NEW COMPOSITION OF MATTER POLY(ETHYLENE TEREPHTHALATE/TETRAMETHYLENE DIBROMOTEREPHTHALATE) CONSISTING OF ARANDOM STRUCTURE OF BLOCKS OF REOCCURRING STRUCTURAL UNITS OF 95 TO 70 WEIGHT PERCENT OF POLY(ETHYLENE TEREPHTHALATES) AND 5 TO 30 WEIGHT PERCENT OF POLY(TETRAMETHYLENE DIBROMOTEREPHTHALATE).
Claim 2
Dependent Claim
36 words
THE NEW COMPOSITION OF MATTER POLY(ETHYLENE TEREPHTHALATE/TETRAMETHYLENE DIBROMOTEREPHTHALATE) CONSISTING OF ARANDOM STRUCTURE OF BLOCKS OF REOCCURRING STRUCTURAL UNITS OF 95 TO 70 WEIGHT PERCENT OF POLY(ETHYLENE TEREPHTHALATES) AND 5 TO 30 WEIGHT PERCENT OF POLY(TETRAMETHYLENE DIBROMOTEREPHTHALATE).
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |