US3873504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retardant copolyester resin containing dialkyl tetrabromo diphenoxyalkane dicarboxylates
Assignee: FMC Corp
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Filing: 1973-10-03
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Granted: 1975-03-25
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Expires: 1993-10-03
Abstract
Abstract Flame-retardant copolyester resin of from at least 3 up to 15 mol percent of random ester units having the following general formula: WHEREIN N IS 2, 4 OR 6 AND D is the residue of a saturated diol, and from 97 to 85 mol percent of at least one different ester unit of a saturated aromatic dicarboxylic acid and a saturated diol.
Inventors
- 👤 Richard R Boettcher
- 👤 William N Knopka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:23
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2965; Y10T428/31504; Y10T428/31826; Y10T428/31833; Y10T428/31837
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
23 words
A FILAMENT-FORMING, COPOLYESTER RESIN OF FROM AT LEAST 3 UP TO 15 MOL PERCENT OF RANDOM ESTER UNITS HAVING THE FOLLOWING GENERAL FORMULA
Claim 2
Dependent Claim
23 words
A FILAMENT-FORMING, COPOLYESTER RESIN OF FROM AT LEAST 3 UP TO 15 MOL PERCENT OF RANDOM ESTER UNITS HAVING THE FOLLOWING GENERAL FORMULA
Claim 3
Dependent Claim
29 words
The copolyester resin of claim 1 wherein -D- is the residue of an aliphatic glycol having the formula HO-(CH2)a-OH wherein a is an integer of from 2 to 10.
Claim 4
Dependent Claim
12 words
The copolyester of claim 2 wherein the aliphatic glycol is ethylene glycol.
Claim 5
Dependent Claim
18 words
The copolyester resin of claim 1 wherein said aromatic dicarboxylic acid is terephthalic acid or 2,6-naphthalene dicarboxylic acid.
Claim 6
Dependent Claim
19 words
The copolyester resin of claim 1 wherein saturated organic dicarboxylic acid is all terephthalic acid or 2,6-naphthalene dicarboxylic acid.
Claim 7
Dependent Claim
13 words
The copolyester resin of claim 1 in the form of a shaped article.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |