US4094926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric phosphorus compounds and flame retardant polyethyleneterephthalate containing said polymers
Assignee: Imperial Chemical Industries Ltd
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Filing: 1976-02-20
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Granted: 1978-06-13
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Expires: 1996-02-20
Abstract
Abstract Phosphorus-containing compounds of the formula <IMAGE> WHEREIN R is phenyl or alkyl of 1 to 4 carbon atoms, m and p are each integers from 2 to 6, n and q are each integers from 1 to 10, y is an integer of at least 2, and flame retardant polymers containing such phosphorus-containing compounds.
Inventors
- 👤 Dennis Richard Sheard
- 👤 Ian Stuart Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:54
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333; C08K5/5337; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/657163; C07F9/657181; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
49 words
A phosphorus-containing compound of the formula: ##STR9## wherein R is phenyl or alkyl of 1 to 4 carbon atoms. m and p are each independently integers from 2 to 6, n and q are each independently integers from 1 to 10, y is an integer of at least 2.
Claim 2
Dependent Claim
49 words
A phosphorus-containing compound of the formula: ##STR9## wherein R is phenyl or alkyl of 1 to 4 carbon atoms. m and p are each independently integers from 2 to 6, n and q are each independently integers from 1 to 10, y is an integer of at least 2.
Claim 3
Dependent Claim
14 words
A phosphorus-containing compound according to claim 1 wherein y is no less than 3.
Claim 4
Dependent Claim
13 words
A phosphorus-containing compound according to claim 1 wherein y does not exceed 30.
Claim 5
Dependent Claim
14 words
A phosphorus-containing compound according to claim 1 wherein m and p are each 2.
Claim 6
Dependent Claim
14 words
A phosphorus-containing compound according to claim 1 wherein n and q are each 1.
Claim 7
Dependent Claim
15 words
A compound of the formula: ##STR10## wherein y is an integer of at least 2.
Claim 8
Dependent Claim
15 words
A compound of the formula: ##STR10## wherein y is an integer of at least 2.
Claim 9
Dependent Claim
15 words
Flame retardant polyethylene terephthalate comprising a minor proportion of a compound according to claim 1.
Claim 10
Dependent Claim
13 words
A shaped article produced from the flame retardant polyethylene terephthalate of claim 7.
Claim 11
Dependent Claim
32 words
Flame retardant polyethylene terephthalate comprising from 0.5% to 25% by weight of a compound according to claim 1, based on the sum of the weights of the polyethylene terephthalate and the compound.
Claim 12
Dependent Claim
15 words
Flame retardant polyethylene terephthalate comprising a minor proportion of a compound according to claim 6.
Claim 13
Dependent Claim
13 words
A shaped article produced from the flame retardant polyethylene terephthalate of claim 10.
Claim 14
Dependent Claim
32 words
Flame retardant polyethylene terephthalate comprising from 0.5% to 25% by weight of a compound according to claim 6, based on the sum of the weights of the polyethylene terephthalate and the compound.
References Cited (Backward Citations)
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US2891915A
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US3378524A
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US3491061A
Cited
US3641219A
Cited
US3655586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |