US3213052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-resistant acrylonitrile polymer compositions containing polybromocyclohexanes and calcium phosphates
Assignee: Dow Chemical Co
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Filing: 1962-01-08
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Granted: 1965-10-19
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Expires: 1982-01-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Fred J Lowes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:11
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/32; C08K5/00; C08K5/02; D; D01; D01F; D01F1/00; D01F1/02; D01F1/07; D01F6/00; D01F6/02; D01F6/18; D01F6/28; D01F6/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
COMPOSITION COMPRISING A SPINNABLE DISPERSION OF (1) A FIBER-FORMING ACRYLONITRILE POLYMER WHICH CONTAINS IN THE POLYMER MOLECULE AT LEAST ABOUT 85 WEIGHT PERCENT OF ACRYLONITRILE, ANY BALANCE BEING ANOTHER MONOETHYLENICALLY UNSATURATED MONOMER THAT IS COPOLYMERIZABLE WITH ACRYLONITRILE, DISSOLVED IN (2) AN AQUEOUS SALINE SOLVENT FOR POLYACRYLONITRILE, SAID SOLVENT HAVING ADDITIONALLY DISPERSED THEREIN (3) AT LEAST ABOUT 10 WEIGHT PERCENT, BASED ON THE WEIGHT OF THE FIBER-FORMING POLYMER, OF A FLAMEPROOFING MIXTURE COMPRISED OF (A) A POLYBROMOCYCLOHEXANE HAVING AT LEAST 3 BROMINE ATOMS IN THE MOLECULE SAID POLYBROMOCYCLOHEXANE BEING PRESENT IN AMOUNTS SUFFICIENT TO PROVIDE AT LEAST ABOUT 3.5 WEIGHT PERCENT OF BROMINE, BASED ON THE WEIGHT OF THE FIBER-FORMING POLYMER AND, (B) A SUBSTANTIALLY WATER-INSOLUBLE CALCIUM PHOSPHATE, THE RATIO OF BROMINE TO CALCIUM PHOSPHATE BEING FROM ABOUT 0.7:1 TO 5.5:1.
Claim 2
Dependent Claim
130 words
COMPOSITION COMPRISING A SPINNABLE DISPERSION OF (1) A FIBER-FORMING ACRYLONITRILE POLYMER WHICH CONTAINS IN THE POLYMER MOLECULE AT LEAST ABOUT 85 WEIGHT PERCENT OF ACRYLONITRILE, ANY BALANCE BEING ANOTHER MONOETHYLENICALLY UNSATURATED MONOMER THAT IS COPOLYMERIZABLE WITH ACRYLONITRILE, DISSOLVED IN (2) AN AQUEOUS SALINE SOLVENT FOR POLYACRYLONITRILE, SAID SOLVENT HAVING ADDITIONALLY DISPERSED THEREIN (3) AT LEAST ABOUT 10 WEIGHT PERCENT, BASED ON THE WEIGHT OF THE FIBER-FORMING POLYMER, OF A FLAMEPROOFING MIXTURE COMPRISED OF (A) A POLYBROMOCYCLOHEXANE HAVING AT LEAST 3 BROMINE ATOMS IN THE MOLECULE SAID POLYBROMOCYCLOHEXANE BEING PRESENT IN AMOUNTS SUFFICIENT TO PROVIDE AT LEAST ABOUT 3.5 WEIGHT PERCENT OF BROMINE, BASED ON THE WEIGHT OF THE FIBER-FORMING POLYMER AND, (B) A SUBSTANTIALLY WATER-INSOLUBLE CALCIUM PHOSPHATE, THE RATIO OF BROMINE TO CALCIUM PHOSPHATE BEING FROM ABOUT 0.7:1 TO 5.5:1.
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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |