US4002689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified, fire retardant polytetramethylene ether glycol
Assignee: Qo Chemicals Inc
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Filing: 1975-04-28
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Granted: 1977-01-11
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Expires: 1995-04-28
Abstract
Abstract Modified polytetramethylene ether glycol containing a 2,3-dibromo-2-butene segment is disclosed. This glycol maintains or improves properties of flexible polyurethanes and polyesters made therefrom and, in addition, improves the fire retardant properties of these resulting polymers. The chemically stable fire retardant diol provides a reactive flame retardant which is non-fugitive and non-migratory, and is neither extracted, nor volatilized from the elastomer into which it is incorporated.
Inventors
- 👤 Hideo Tomomatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:17
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/6795; C08G63/00; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
62 words
A glycol composition having the following structural formula: ##STR3## wherein m and n are integers including zero, and wherein both m and n are not zero at the same time, and wherein X is a structure having the formula: ##STR4## wherein m and n are such that the number average molecular weight of the composition is in the range of 400-5000, inclusive.
Claim 2
Dependent Claim
62 words
A glycol composition having the following structural formula: ##STR3## wherein m and n are integers including zero, and wherein both m and n are not zero at the same time, and wherein X is a structure having the formula: ##STR4## wherein m and n are such that the number average molecular weight of the composition is in the range of 400-5000, inclusive.
Claim 3
Dependent Claim
9 words
The composition of claim 1 wherein n is zero.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |